https://www.youtube.com/watch?v=QAqhrm64VIQ
“I am the light of the world. He who follows Me shall not walk in darkness, but have the light of life.” That is the promise of John 8:12, and it is far bigger than a nice religious metaphor. Jesus is not simply offering better ideas or a little encouragement for hard days. He is offering light, life, freedom, cleansing, truth, and fellowship with God.
God made the natural world in a way that helps us understand spiritual realities. Light is essential to life. And in the same way, the light of Christ is essential to a healthy soul.
A World Carefully Made for Life
The world we inhabit is not a random pile of parts. It is finely tuned for human life. Our place in the solar system, the composition of the atmosphere, the properties of water and oxygen, and the physical constants that govern creation all work together with extraordinary precision.
Even the late astronomer Fred Hoyle, who was not a Christian, famously remarked that the facts point toward a super-intellect having “monkeyed with” physics, chemistry, and biology. You do not have to be a theologian to look around and recognize that this whole thing looks made.
God is a master Creator. Creation is like a giant building set, only far more intricate than any erector set or Lego collection could ever be. Everything is ordered so that life can flourish.
We Are, in a Very Real Sense, Light Eaters
Sunlight is vital to our lives. All the energy in the food chain comes from the sun. Plants take light through photosynthesis and produce the sugars and compounds that sustain plant life, animal life, and human life. Whether we eat plants directly or eat animals that eat plants, the energy ultimately traces back to sunlight.
The sun produces light in the wavelengths we need, and the atmosphere filters light with remarkable precision. If that filtering shifted too far in one direction, harmful ultraviolet radiation would damage cells. Shift too far in the other direction, and the balance of heat entering the atmosphere would become destructive. The world is carefully fitted for life.
Inside the body, light affects more than just what we see. Our cells contain mitochondria, tiny energy factories that create ATP, the fuel used by muscles and the rest of the body. That energy-making process also creates waste products, including reactive oxygen species, often called free radicals.
Our bodies need antioxidants to deal with those byproducts. Melatonin is one of the powerful antioxidants available to the body, and it is also closely connected with sleep and light exposure. Morning sunlight signals the body differently than artificial light late at night. That is part of the reason our circadian rhythms matter so much.
Light exposure influences numerous systems in the body, including sleep patterns, hormone regulation, alertness, mood, and energy. The natural world is full of these reminders that light is not optional. It is life-giving.
Light, Health, and Humility
Research into red and near-infrared light has explored what is sometimes called photobiomodulation. One study discussed in this message found that adults exposed to red light before a glucose challenge had a lower overall rise in blood glucose and a smaller peak over the following hours. The proposed mechanism was increased mitochondrial activity and glucose uptake.
Other research has examined light exposure in relation to inflammation, pain, blood flow, insulin sensitivity, mental clarity, and mood. This is not merely internet “bro science.” There are published studies examining these effects.
Still, the main point is not to turn sunlight into a religion or treat a red-light device like a savior. God made the sun. It should not surprise us when creation reflects the wisdom of its Creator.
What History Teaches About Sunlight
During the Industrial Revolution, cities in the United Kingdom were covered in smog. Children and young people working in factories experienced severe outbreaks of rickets, while children living and working outdoors on farms did not experience the same pattern.
Doctors began to suspect that lack of sunlight was part of the problem. Systematic sun exposure was used, and rickets improved dramatically. Later, scientists discovered that sunlight on the skin helps produce vitamin D, which plays an important role in immune function and overall health.
There was also a period when physicians used heliotherapy, or sunlight treatment, in work with tuberculosis patients. Open-air wards, south-facing balconies, and outdoor schooling became common in some places. Many patients with bone and joint tuberculosis showed significant improvement.
Eventually, concern about excessive ultraviolet exposure and skin cancer shifted public perception. The sun became a villain in many people’s minds. Of course, too much sun can be harmful, and wisdom matters. But it is easy for a culture to swing so far in one direction that it forgets the goodness of what God made.
That cultural suspicion of sunlight provides a useful picture of a deeper problem: people can become suspicious of spiritual light too.
Jesus Is the Light of the World
Jesus declared, “I am the light of the world,” during the Feast of Tabernacles. This feast was one of Israel’s great pilgrimage celebrations. It remembered God’s provision during Israel’s wilderness journey, when He led His people with a cloud by day and a pillar of fire by night. It also celebrated the fall harvest.
During the feast, four enormous golden lampstands stood in the temple courts. They were so large that their light reached across much of Jerusalem. For a week, people celebrated under the glow of those lamps.
Then, as the feast ended, Jesus taught in the temple. The festival lights were fading, and the sun was rising. The glory of those great lampstands could not compare to the true light coming into the world.
Jesus is the true menorah, the visible presence of God’s light among His people. The old covenant contained types, shadows, and signs. The substance is Christ.
The Woman Caught in Adultery: Light Without Condemnation
In John 8, the scribes and Pharisees brought a woman who had been caught in adultery and placed her before Jesus. Their concern was not justice. Their concern was trapping Him.
If Jesus told them to stone her, they could accuse Him before the Romans because they did not have legal authority to carry out executions. If He told them not to stone her, they could accuse Him of rejecting the Law of Moses.
But their setup was hypocritical from the beginning. The Law required both the man and the woman to be brought forward in such a case. Where was the man?
Jesus bent down and wrote in the dirt. Scripture does not tell us what He wrote, and we should be humble enough to admit that we do not know. Maybe He exposed their hypocrisy. Maybe He wrote a question they did not want to answer. Maybe someday we will know.
When they continued pressing Him, Jesus stood and said, “He who is without sin among you, let him throw a stone at her first.” One by one, beginning with the oldest, they left.
Then Jesus asked the woman where her accusers were. When she answered that no one had condemned her, Jesus said, “Neither do I condemn you; go and sin no more.”
This is the light of life. It brings sin into the open, but it does not leave us there to be crushed. The light of Christ brings conviction without condemnation. It exposes, cleanses, restores, and calls us into a new way of living.
We do not need to pretend that sin is not sin. Jesus did not do that. He told the woman to leave her sin behind. But neither did He hand her over to shame, cruelty, and self-righteous accusers. He gave mercy and truth together.
When We Sit in Darkness, the Lord Is Our Light
The words of Micah give language to the hope found in Christ:
“When I fall, I will arise; when I sit in darkness, the Lord will be a light to me.”
There is a confession in that passage. “I have sinned against Him.” Every one of us comes to God that way. Nobody has earned grace. Nobody stands before the Lord because they are impressive enough, disciplined enough, or religious enough.
But the same God who exposes sin also pleads our cause. He brings us out into the light. It is far better to have God vindicate us than to spend our lives desperately trying to defend ourselves.
That woman was dragged out of a dark place and placed in the public light, but her accusers did not love the light. They only wanted a tan. They wanted the appearance of righteousness without the transforming work of truth in their own hearts.
Jesus, however, brought her into a different kind of light: the light of forgiveness, freedom, and a future.
Light Reveals What Is Already There
Light does not create the truth. It reveals it.
Think about walking into a dark room and opening the curtains. Suddenly, sunbeams fill the room and you see dust floating everywhere. The sunlight did not create the dust. It simply made visible what was already present.
That is what the light of Christ does. It reveals what is there. It may expose sin, pride, bitterness, compromise, fear, or secrecy. But it can also reveal good things that were hidden: compassion, honesty, faithfulness, hunger for truth, and the work of God already taking place in someone’s life.
We should have compassion for people who have lived in darkness. Some were raised in darkness, surrounded by confused teaching, broken homes, false religion, pain, and deception. The response of God’s people should not be smugness. It should be compassion.
Still, Jesus said that light came into the world and people loved darkness rather than light because their deeds were evil. Children may be afraid of the dark, but grown-ups are often afraid of the light. Pride makes us want to hide rather than be known.
Truth demands a response. Once the light comes, responsibility comes with it. When God reveals something, we must deal with it. We must receive the truth and walk in it.
Walking in the Light Means Walking With Others
First John 1:5-7 says that God is light and there is no darkness in Him. It also says that if we walk in the light as He is in the light, we have fellowship with one another, and the blood of Jesus cleanses us from all sin.
This is not only an individual message. It is a message to the church.
Walking in the light means that, to some extent, our lives become open books. That does not mean every person needs access to every detail of our lives. It does mean that we cannot build our lives around secrecy.
Paul could tell the elders in Ephesus that they knew how he lived among them. They had seen his conduct, his humility, his service, his struggles, and his life up close. He did not preach one thing from a distance while living another thing in private.
Walking in the light requires vulnerability. We need people close enough to us to tell us the truth with tenderness. Sometimes we need someone who loves us enough to say, “You are being a jerk.” It may not feel good in the moment, but thank God for brothers and sisters who care enough to be honest.
A healthy Christian community is part of God’s plan for spiritual maturity. Marriage has a way of sanding down our rough edges. Church does too. When we work together, serve together, and simply spend time together, we can get on one another’s nerves. And, believe it or not, God can use that.
Iron sharpens iron. We learn patience. We learn forgiveness. We learn how to overlook an offense. We learn how to speak truth without destroying one another.
James 5:16 tells believers to confess their trespasses to one another and pray for one another so that they may be healed. That cannot happen in isolation. It does not require a giant church building, but it does require a real body of believers.
For more messages on spiritual growth, faith, and Christian community, explore the Pastor Alan Couchman video archive.
Light as a Symbol of God’s Government
Genesis tells us that God made two great lights: the greater light to govern the day and the lesser light to govern the night. That language is interesting. The sun governs the day. The moon rules the night.
Throughout Scripture, light becomes a symbol of government. One of the primary ways God governs human beings is through enlightenment. He teaches, reasons, persuades, and reveals truth.
God does not govern animals that way. Animals are governed by instinct. He does not need to reason with a rock or persuade the sun to shine. But men and women are made in the image of God. We are made for relationship with Him.
God says, “Come now, and let us reason together.” His purpose is not merely to control us from a distance. His purpose is to make His home with us. The mystery of the gospel is Christ in us.
Jesus said, “You shall know the truth, and the truth shall make you free.” The freedom He offers is freedom from the bondage of sin, shame, fear, and secrecy. When we agree with God, our ruler and governor, we enter deeper fellowship with Him.
Do Not Be Afraid of the Light
The disciples on the road to Emmaus met the risen Jesus without recognizing Him at first. He walked with them, reasoned with them, and opened the Scriptures to them. Their hearts burned within them as truth became clear.
Then, in fellowship over bread, their eyes were opened and they knew Him.
This is the way the light of God works. It opens Scripture. It awakens the heart. It reveals Jesus. It draws us into fellowship. And it sends us out with good news.
If God’s light reveals sin, do not run from it. Do not fear what He will find. Bring it to Him. He is not against you. Jesus Christ the righteous is our advocate before the Father. God works in us both to will and to do according to His good pleasure.
We can love the light because we do not have to face it alone. God meets us there, deals with us there, cleanses us there, and leads us forward.
Shine Your Light
Isaiah declared that people walking in darkness would see a great light. That light has come in Jesus Christ.
So rejoice in the light. Do not hide it under a bowl. Let it shine through integrity, generosity, love, compassion, and good works that bring glory to the Father.
- Walk uprightly, even when nobody is looking.
- Refuse secrecy and invite trustworthy believers to speak into your life.
- Receive conviction without surrendering to condemnation.
- Love people who are difficult to love.
- Give generously, trusting God to provide grace for every calling.
- Bring heavy burdens to the Lord, because He cares for you.
The whole purpose of redemption is not simply to get us off this earth someday. From the beginning, God has been restoring what was lost so that He can make His dwelling place among His people. He has tabernacled among us in Jesus, and by His Holy Spirit He makes His home in hearts of clay.
Walk in that light. Receive that light. And let the light of Christ shine through you.
