Light is an amazing thing. While it does not have physical properties, it can have a profound effect on physical objects. Light is basically a wave of energy that can be seen by the naked eye.
How does God use this in teaching truth? Glad you asked.
Again Jesus spoke to them, saying, “I am the light of the world. Whoever follows Me will not walk in darkness but will have the light of life.”
But if we walk in the light, as He is in the light, we have fellowship with one another, and the blood of Jesus His Son cleanses us from all sin.
Truly for those of us who seek His light we know the impact in our lives. Was God giving all a sweet foretaste of what more light feels like when daylight hours increase? Give it some thought.
Gary