📖 Reading 4.2: Caffeine, Alcohol, Food, Screens, Temperature, and the Sleeping Place
Reading 4.2: Caffeine, Alcohol, Food, Screens, Temperature, and the Sleeping Place
The organic human does not enter the night untouched by the day.
Caffeine consumed earlier, alcohol used to become drowsy, an uncomfortable meal, an upsetting message, bright light, excessive heat, persistent noise, or an unsafe sleeping place may all influence the night.
These influences should be examined without shame.
The purpose of this reading is not to create a perfect evening, prescribe one universal bedtime routine, or imply that every sleep problem results from poor choices. The purpose is to help you notice the messages your evening may be sending to your brain, nervous system, digestive system, circadian rhythm, emotions, and sense of safety.
You can shape your sleep opportunity, but you cannot guarantee the sleep outcome.
Your Evening Is an Organic-Human Transition
An organic human is an embodied soul with spiritual and physical life before God.
You do not leave your body, thoughts, relationships, responsibilities, or surroundings outside the bedroom. The whole person enters the night.
Your spiritual life participates through:
Trust
Fear
gratitude
Anger
Desire
Memory
Prayer
Hope
Self-conversation
Your bodily life participates through:
Alertness
Sleep pressure
Digestion
Breathing
Temperature regulation
Pain
Hormonal activity
Medication effects
Sensitivity to light, sound, and touch
Your practical and relational life also participates through work, caregiving, household responsibilities, conflict, technology, housing conditions, and personal safety.
The goal is not to become preoccupied with every influence. The goal is to recognize patterns and make one or two wise adjustments without turning sleep into another performance.
Christian Stewardship Without Perfectionism
First Corinthians 10:31 says:
“Whether therefore you eat or drink, or whatever you do, do all to the glory of God.”
This passage does not establish a list of foods or drinks that guarantee sleep. It reminds Christians that ordinary bodily practices belong before God.
Christian stewardship asks:
Is this practice helping me love God and others?
Is it supporting or unnecessarily disrupting my organic body?
Am I using something wisely, compulsively, or as an attempted escape?
Is this pattern within my control?
Do I need grace, a boundary, or qualified help?
Stewardship is not bodily perfection.
You may make wise choices and still sleep poorly. You may live with pain, hormonal changes, breathing problems, grief, trauma, night work, poverty, caregiving, or circumstances that no evening routine can remove.
Poor sleep is not proof that you have failed God.
Caffeine: Alertness Has a Longer Story
Caffeine is found in coffee, many teas, energy drinks, some soft drinks, chocolate, certain supplements, and some medications.
Caffeine promotes alertness partly by interfering with the action of adenosine, a chemical signal involved in the buildup of sleep pressure. This can be useful during the active day, but it can also make the transition toward sleep more difficult.
A recent meta-analysis of controlled crossover trials found that caffeine reduced total sleep time and sleep efficiency while increasing the time required to fall asleep. Effects varied across participants and studies, and both lower and higher doses affected some sleep measures. (PubMed)
The practical lesson is not that all Christians must stop drinking coffee.
The lesson is that amount and timing both matter.
Individual Responses Differ
People vary in how strongly and how long caffeine affects them.
Differences may be related to:
Genetics
Age
Pregnancy
Medications
Liver function
Habitual caffeine use
Amount consumed
Time of consumption
Personal sensitivity
Other health conditions
This variation is why the course does not give one universal caffeine cutoff time.
A statement such as “Nobody should consume caffeine after noon” may be memorable, but it does not account for people who work nights, wake at different times, metabolize caffeine differently, or use prescribed medications containing caffeine.
A better approach is observation.
Ask:
What caffeinated products do I use?
At what times do I use them?
How much do I consume?
Do I use caffeine to compensate for chronic sleep loss?
Do I notice a relationship between later caffeine and greater alertness at night?
Am I consuming more caffeine than I realize?
A Caffeine Observation Practice
For several days, write down:
The caffeinated product.
The approximate amount.
The time consumed.
Your level of evening alertness.
Whether you experienced difficulty settling.
Do not use the record to condemn yourself. Use it to notice a possible pattern.
You might choose one experiment, such as:
Reducing the amount of the latest caffeinated drink.
Moving it earlier in your waking day.
Replacing one serving with a non-caffeinated option.
Checking whether a medicine or supplement contains caffeine.
Discussing persistent fatigue with a healthcare professional instead of continually increasing caffeine.
Do not stop or alter a prescribed medication without professional guidance.
Caffeine Is Not a Character Test
Some people can drink coffee late and report no obvious difficulty. Others are highly sensitive.
Neither response proves superior discipline or spiritual maturity.
A person using caffeine to remain awake through night work, emergency service, parenting, or caregiving may be trying to function within demanding circumstances. The appropriate response is not shame.
The deeper questions may be:
Is this schedule sustainable?
Am I dangerously sleepy?
Am I driving or working in an unsafe condition?
Is an untreated medical problem contributing to my exhaustion?
What support is realistically available?
Caffeine can temporarily increase alertness, but it does not replace the restorative functions of sleep.
Alcohol: Drowsiness Is Not the Same as Healthy Sleep
Alcohol can make a person feel relaxed or drowsy. This is one reason it is sometimes used as a “nightcap.”
However, becoming sedated is not the same as moving naturally through healthy sleep.
A 2025 systematic review and meta-analysis found that alcohol delayed the beginning of rapid eye movement, or REM, sleep and reduced REM duration. These disruptions were found even at relatively low doses and became greater as the dose increased. High doses sometimes shortened the initial time required to fall asleep, but that apparent benefit came with greater disruption of subsequent sleep architecture. (PubMed)
This helps explain a common experience:
“Alcohol helped me fall asleep, but I awakened later, slept restlessly, or did not feel restored.”
The research does not establish that every person will experience exactly the same effects after every drink. It does show that alcohol should not be presented as a dependable sleep treatment.
Alcohol, Snoring, and Breathing
Alcohol may also relax tissues involved in keeping the upper airway open. Systematic reviews have associated alcohol consumption with worsened breathing measures during sleep, especially among people who snore or already have obstructive sleep apnea. (PubMed)
A person who has loud persistent snoring, witnessed breathing pauses, choking, gasping, morning headaches, or severe daytime sleepiness should seek qualified medical assessment.
The answer is not merely to develop a better bedtime routine. Possible sleep apnea requires clinical evaluation.
Alcohol Use Requires Compassion and Safety
Some people use alcohol to quiet worry, grief, loneliness, trauma memories, physical pain, or racing thoughts. Others may use it because it has become part of a social or evening habit.
A Christian response should combine truth with compassion.
Alcohol may be affecting sleep, but shaming a person rarely produces honest reflection or safe change.
Questions may include:
What am I asking alcohol to do for me?
Am I using it mainly to become sleepy?
Is the amount increasing?
Do I experience difficulty controlling its use?
Is it interacting with medications or health problems?
Is it affecting my relationships, judgment, or responsibilities?
Do I need professional help?
Someone who has been drinking heavily for a prolonged period should not suddenly stop without medical guidance. Alcohol withdrawal can be dangerous or life-threatening, and qualified medical support may be needed. (NIAAA)
A minister, chaplain, or life coach should not attempt to manage alcohol withdrawal or provide substance-use treatment.
Food: Nourishment, Timing, and Bodily Comfort
Food is a good gift from God. Eating supports energy, relationship, culture, celebration, work, health, and embodied life.
Food can also affect how the organic body feels at night.
Some people experience sleep disruption related to:
Going to bed very hungry
Eating far more than is comfortable
Heartburn or reflux
Digestive discomfort
Certain personally aggravating foods
Irregular eating connected with shift work
Blood-sugar conditions requiring medical management
Pregnancy-related nausea or reflux
Medications that affect appetite or digestion
The evidence connecting overall diet and sleep is still developing. Systematic reviews commonly find associations between healthier dietary patterns and better reported sleep, while heavily processed or high-sugar dietary patterns are often associated with poorer sleep. However, much of this evidence is observational and cannot prove that one dietary pattern directly caused the sleep outcome. (PubMed)
Sleep itself can also influence appetite and food choices. The relationship may work in both directions.
Avoid Creating a “Perfect Sleep Diet”
This course does not teach that a particular food will make everyone sleep.
It does not promise that:
One fruit will produce sleep.
One herbal drink will cure insomnia.
Carbohydrates are always good or always bad at night.
Everyone must stop eating at the same hour.
Fasting is a universal sleep intervention.
Expensive organic foods are required.
Supplements can replace medical evaluation.
Research on time-restricted eating and sleep has produced mixed findings. Reviews have not established a clear, universal sleep benefit, and some studies report no meaningful change or possible reductions in certain sleep measures. (PubMed)
The wise question is not, “What is the perfect bedtime food rule?”
The wiser questions are:
What helps my body feel appropriately nourished?
What commonly creates discomfort for me?
Does eating very late reflect hunger, work demands, medication needs, culture, or habit?
Do I have symptoms that should be discussed with a clinician?
What modest adjustment is realistic?
People with diabetes, pregnancy, gastrointestinal disorders, eating disorders, food insecurity, or medically prescribed diets should seek appropriate guidance rather than following generic internet sleep-diet rules.
Food Insecurity and Global Reality
Not everyone can choose ideal meal timing or preferred foods.
Some participants:
Eat when food becomes available.
Work through normal meal periods.
Share limited food with family members.
Live without refrigeration.
Depend on institutional meals.
Fast for religious or cultural reasons.
Experience hunger because of poverty or displacement.
Work night shifts with limited meal options.
The course must not turn economic privilege into a spiritual standard.
A no-cost practice may simply be noticing which available meals leave the body more comfortable or uncomfortable at bedtime.
Where hunger is disrupting sleep, the faithful response may involve community support, food assistance, hospitality, advocacy, or practical ministry—not advice to purchase specialized sleep foods.
Screens: More Than Blue Light
Phones, tablets, televisions, computers, and other screens can affect the evening in several ways.
A screen may:
Provide light during a biologically sensitive period.
Delay bedtime because content continues.
Carry work into the sleeping place.
Introduce upsetting news or conflict.
Encourage social comparison.
Increase mental stimulation.
Awaken a person through notifications.
Replace prayer, conversation, or quiet.
Provide useful Scripture, music, connection, or safety communication.
The relationship between screens and adult sleep is more nuanced than the statement, “Blue light is always the whole problem.”
A 2024 expert consensus found strong agreement that screen use impairs sleep health among children and adolescents, but the evidence did not support equally simple conclusions for all adults. Screen content, timing, brightness, individual sensitivity, and the displacement of sleep opportunity all matter. (PubMed)
A large 2025 observational study of adults associated daily screen use during the hour before bed with later bedtimes, somewhat shorter sleep, and a greater prevalence of poor sleep quality. Because the study was observational, it cannot prove that screen use alone caused every difference. (PubMed)
The Content May Matter as Much as the Device
Consider the difference between:
Listening to a quiet Psalm.
Arguing through text messages.
Watching alarming news.
Reading a familiar story.
Answering work messages.
Looking at family photographs.
Scrolling without an intended stopping point.
Video-calling a loved one in another country.
Listening to an adult lullaby.
All involve a device, but they do not create the same emotional or cognitive experience.
The question is not merely:
“Did I use a screen?”
It is also:
“What did the screen ask my organic human to do?”
Did it ask you to solve, react, compare, purchase, argue, fear, work, or remain vigilant?
Or did it help you connect, pray, settle, or feel appropriately safe?
A Realistic Screen Practice
A complete screen ban may not be practical. Your phone may serve as your alarm, Bible, music player, work connection, medical support, or only means of communication.
Choose a realistic adjustment:
Lower the brightness.
Use a warmer display setting.
Silence nonessential notifications.
Move work messages earlier when possible.
Avoid emotionally intense content near bedtime.
Charge the device beyond immediate reach if safe.
Choose one quiet audio practice.
Establish a stopping point for scrolling.
Ask household members to delay nonurgent conflict.
Keep emergency contacts available.
Research on blue-light-blocking glasses and other short-wavelength light interventions remains mixed. Some studies suggest benefit, while others do not. Such products should not be presented as necessary or as a substitute for broader changes in content, timing, and sleep opportunity. (PubMed)
Temperature: The Body Must Release Heat
The organic body changes temperature across the sleep-wake cycle. An excessively hot or cold sleeping environment may make settling and remaining asleep more difficult.
However, there is no single perfect bedroom temperature for every person.
Comfort depends on:
Climate
Humidity
Bedding
Sleepwear
Air movement
Age
Hormonal changes
Illness
Pregnancy
Medication
Personal preference
Whether people share a bed or room
Research examining real bedrooms has associated higher temperature, noise, air pollution, and elevated carbon dioxide with reduced sleep efficiency. These findings support attention to the sleeping environment but do not establish one universal numerical setting or prove that environment explains every sleep problem. (PubMed)
Low-Cost Temperature Practices
Where possible and safe:
Use lighter or heavier bedding.
Adjust sleepwear.
Improve safe air movement.
Open a window when weather, air quality, and security permit.
Use a fan when available.
Move away from a heat source.
Use separate blankets for partners with different needs.
Take a comfortable bath or wash before bed.
Hydrate appropriately during the day.
Address fever, hot flashes, or unusual night sweating medically when needed.
A participant living without air conditioning has not failed.
A participant living in extreme heat may be facing a public-health, housing, or economic problem—not a lack of sleep discipline.
Noise, Quiet, and Sound
Unexpected or changing noise can draw the brain’s attention, even when a person does not fully awaken.
Transportation noise has been associated with greater self-reported sleep disturbance across large bodies of research. (PubMed)
Possible low-cost adaptations include:
Closing a door or window when safe.
Asking for a reasonable household quiet period.
Moving the sleeping position away from a noise source.
Using available ear protection when medically and practically appropriate.
Choosing a familiar, low-volume sound.
Using a fan or existing household sound to mask unpredictable noise.
Addressing barking animals, alarms, or vibrating devices where possible.
Continuous white noise is widely promoted, but a systematic review found the evidence for improving sleep to be very low in quality and inconsistent. Continuous sound may help some people, have little effect for others, or become disruptive when too loud. (PubMed)
Sound should therefore be treated as a personal support, not a proven cure.
Protect hearing by keeping sound at a modest level. A person must also remain able to hear important alarms, children, medical equipment, or danger signals.
The Sleeping Place and Perceived Safety
Psalm 4:8 says:
“In peace I will both lay myself down and sleep, for you alone, Yahweh, make me live in safety.”
Safety is spiritual, relational, physical, and environmental.
A sleeping place may feel unsettled because it has become associated with:
Work
Conflict
Threat
Illness
Caregiving
Loneliness
Trauma
Repeated sleeplessness
Clock-watching
Constant media
Household instability
Where realistically possible, allow the sleeping place to communicate:
The active work of the day is ending.
I do not have to solve everything here.
This is a place where my body may release effort.
This does not mean every person needs a separate bedroom.
A sleeping place may be:
A shared bedroom
A hospital room
A shelter
A military barracks
A couch
A mat
A dormitory
A vehicle during approved rest
A room shared with children
A space used by different family members at different times
The practice must fit the actual place.
Prepare the Place Without Worshiping the Place
Sleep advice can become consumer marketing.
People may be told that they need:
A luxury mattress
Specialized bedding
Expensive cooling systems
Smart lighting
A sound machine
A wearable tracker
A subscription application
A redesigned bedroom
Comfort matters, but sleep cannot be purchased as a guaranteed outcome.
A simple sleeping-place preparation may include:
Remove one unnecessary source of stimulation.
Arrange available bedding for comfort.
Prepare medications exactly as prescribed.
Address reasonable safety needs.
Lower unnecessary light.
Choose quiet or gentle sound.
Place tomorrow’s concern on paper.
Entrust the outcome to God.
The purpose is not perfection. It is faithful preparation.
Creation, Fall, Redemption, and Fellowship
Creation: Receive Bodily Wisdom
God created human beings who respond to food, drink, light, sound, warmth, relationship, and place.
These responses are not embarrassments. They are part of embodied creaturely life.
The evening can become a practice of receiving limits:
I do not need endless stimulation.
I do not need to remain alert at every hour.
My body is allowed to prepare for rest.
Fall: Good Things Can Become Disordered
Food, drink, technology, work, and entertainment can be used with gratitude. They can also become disordered.
We may use caffeine to deny exhaustion, alcohol to escape pain, food to soothe distress, technology to avoid silence, or late-night work to prove our worth.
The fall also appears through circumstances we did not choose:
Addiction
Poverty
Unsafe housing
Noise
Heat
Trauma
War
Exploitative employment
Caregiving without support
Not every sleep block is personal sin. Some are connected with injustice, illness, loss, or human vulnerability.
Redemption: Grace Tells the Truth
Jesus Christ brings conviction without condemnation.
Grace allows you to say:
My caffeine pattern may be affecting me.
Alcohol is not giving me the rest I hoped for.
My evening screen use is extending the day.
I am carrying work into the sleeping place.
My environment is difficult.
I need help.
Truth is not the enemy of grace. In Christ, truth becomes a pathway toward repentance, wisdom, boundaries, support, and hope.
Fellowship With the Holy Spirit: Discernment in Ordinary Life
The Holy Spirit is present not only during formal worship but also within ordinary choices.
You may pray:
Holy Spirit, show me what is supporting my organic body and what is keeping me unnecessarily alert. Give me freedom from shame, honesty about my habits, compassion for my circumstances, and wisdom for one faithful change.
The answer may be a practical adjustment.
It may also be an invitation to seek treatment, disclose a struggle, ask for household cooperation, address addiction, or receive help from the Christian community.
Organic Male and Female Considerations
Men and women share the same basic sleep systems, yet bodily and social patterns may differ.
Women may experience changes in temperature comfort, digestion, caffeine sensitivity, or alcohol effects during pregnancy, postpartum life, perimenopause, and menopause. Hot flashes and nighttime caregiving may make standard environmental advice unrealistic.
Men may be more likely to use alcohol as a sleep aid, minimize snoring, or delay assessment for breathing problems. They may also use caffeine to sustain long work hours or performance expectations.
These are possible patterns, not stereotypes.
Each organic human should consider personal biology, life stage, health, responsibilities, and experience.
Pregnant participants should discuss caffeine, alcohol, medications, and persistent sleep difficulties with a qualified prenatal healthcare professional.
What the Evidence Does and Does Not Show
The Evidence Supports
Caffeine can delay sleep onset and reduce sleep time or efficiency.
Both caffeine amount and timing matter.
Alcohol can create drowsiness while disrupting later sleep architecture.
Alcohol may worsen sleep-related breathing in susceptible people.
Meal comfort and overall dietary patterns may relate to sleep.
Adult screen effects involve timing, content, light, and lost sleep opportunity.
Excessive heat, noise, light, and poor air quality may interfere with sleep.
Environmental and behavioral effects vary substantially between people.
The Evidence Does Not Show
One caffeine cutoff works for everyone.
Every Christian must avoid coffee.
Alcohol is a reliable sleep medicine.
One food or drink cures insomnia.
Everyone must stop eating at the same time.
Blue light is the only screen-related concern.
Every adult must completely eliminate evening screens.
One ideal bedroom temperature applies worldwide.
White noise reliably improves everyone’s sleep.
Expensive products are necessary.
A perfect sleeping environment guarantees sleep.
Poor sleep proves poor stewardship or weak faith.
Ministry Role Clarity
A minister, chaplain, Soul Coach, or Christian life coach may:
Help a participant notice evening patterns.
Discuss caffeine or alcohol without condemnation.
Encourage a participant to speak with a clinician or pharmacist.
Support one realistic environmental change.
Pray by permission.
Help establish a boundary around work or conflict.
Connect someone with food, housing, addiction, or medical resources.
Affirm that poverty and shared housing are not moral failures.
A ministry leader may not:
Diagnose insomnia, addiction, reflux, or sleep apnea.
Prescribe a caffeine limit.
Manage alcohol withdrawal.
Recommend medication changes.
Prescribe supplements or sleep products.
Require complete screen abstinence.
Promise sleep through a particular routine.
Blame a participant for heat, noise, crowding, or unsafe housing.
Present prayer as a guaranteed cure.
Medical and Safety Note
Seek qualified medical or professional help when concerns include:
Possible alcohol dependence or withdrawal
Medication and alcohol interactions
Severe or persistent reflux
Significant appetite or eating concerns
Loud snoring or breathing pauses
Choking or gasping during sleep
Severe daytime sleepiness
Drowsy driving
Sudden changes in sleep
Persistent insomnia with daytime impairment
Severe night sweating, pain, or other unexplained symptoms
A sleeping environment involving violence, abuse, unsafe heat, dangerous cold, or hazardous air
Do not stop prescribed medications, CPAP treatment, caffeine-containing medication, alcohol after prolonged heavy use, or other treatment without appropriate professional guidance.
Reflection Questions
Which evening input most often communicates alertness to your organic body?
What have you noticed about the amount and timing of your caffeine use?
Are you using alcohol, food, entertainment, or technology to manage an emotion that needs a different form of care?
What does your screen usually ask your mind and body to do before sleep?
Which feature of your sleeping place is supportive?
Which feature is difficult but realistically adjustable?
Which circumstance requires compassion rather than blame?
Is there a concern that should be discussed with a physician, pharmacist, counselor, or other qualified professional?
What is one low-cost evening change you can practice without demanding a particular sleep outcome?
One Faithful Evening Step
Complete this sentence:
To prepare wisely without trying to force sleep, tonight I will ________________________________.
Then add:
If sleep does not come as I hope, I will not declare an emergency. I will receive quiet wakefulness, use the PEACE practice, and entrust the outcome to God.
Closing Prayer
Lord God, thank you for creating me as an organic human with spiritual and physical life before you.
You know the foods I eat, the drinks I consume, the work I carry, the messages I receive, the place where I sleep, and the circumstances I cannot easily change.
Forgive me when I use good things without wisdom, deny my creaturely limits, or seek escape instead of honest care. Release me from condemnation and from the demand to create a perfect evening.
Lord Jesus, meet me with grace and truth. Where a habit is harming me, give me courage to name it. Where my circumstances are difficult, give me compassion and practical support. Where I need professional help, give me humility to seek it.
Holy Spirit, guide my evening choices. Help me prepare my organic body, release unnecessary stimulation, receive my limitations, and entrust unfinished concerns to Christ.
Protect those who live with addiction, hunger, unsafe housing, extreme heat, relentless noise, shift work, illness, or caregiving burdens. Surround them with faithful people and wise care.
Whether sleep comes quickly or slowly, remind me that I belong to you.
Help me lie down in peace and wake in hope.
Amen.
Academic and Ministry References
Bohlman, C., McLaren, C., Ezzati, A., et al. “The Effects of Time-Restricted Eating on Sleep in Adults: A Systematic Review of Randomized Controlled Trials.” Frontiers in Nutrition, 2024, 11, 1419811. DOI: 10.3389/fnut.2024.1419811.
Gardiner, C., Weakley, J., Burke, L. M., et al. “The Effect of Alcohol on Subsequent Sleep in Healthy Adults: A Systematic Review and Meta-Analysis.” Sleep Medicine Reviews, 2025, 80, 102030. DOI: 10.1016/j.smrv.2024.102030.
Godos, J., Grosso, G., Castellano, S., et al. “Association Between Diet and Sleep Quality: A Systematic Review.” Sleep Medicine Reviews, 2021, 57, 101430. DOI: 10.1016/j.smrv.2021.101430.
Hartstein, L. E., Mathew, G. M., Reichenberger, D. A., et al. “The Impact of Screen Use on Sleep Health Across the Lifespan: A National Sleep Foundation Consensus Statement.” Sleep Health, 2024, 10(4), 373–384. DOI: 10.1016/j.sleh.2024.05.001.
Johnson, D. A., Billings, M. E., and Hale, L. “Associations of Bedroom PM2.5, CO2, Temperature, Humidity, and Noise With Sleep: An Observational Actigraphy Study.” Sleep Health, 2023. DOI: 10.1016/j.sleh.2023.03.007.
Kolla, B. P., Coombes, B. J., Morgenthaler, T. I., and Mansukhani, M. P. “Alcohol and the Risk of Sleep Apnoea: A Systematic Review and Meta-Analysis.” Sleep Medicine Reviews, 2018, 42, 38–46. DOI: 10.1016/j.smrv.2018.05.005.
Riedy, S. M., Smith, M. G., Rocha, S., and Basner, M. “Noise as a Sleep Aid: A Systematic Review.” Sleep Medicine Reviews, 2021, 55, 101385. DOI: 10.1016/j.smrv.2020.101385.
Scripture References Used
Genesis 1:3–5
Psalm 4:8
Psalm 121:3–4
Proverbs 20:1
Romans 8:1
Romans 12:1–2
1 Corinthians 6:12
1 Corinthians 10:23–31
Ephesians 5:15–18
Philippians 4:5–9
1 Peter 5:7