Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life.’ John 8:12 kjv
The allegory used by the Lord in this verse speaks of the light of His Truth, the light of His Word, the light of eternal Life. Those who perceive the true Light will never walk in spiritual darkness.
“Light is beautiful and mysterious”,more like God. It is one but can be separated into many colors. No one knows if light is made up of particles or waves. In addition light has many functions that makes it a good symbol for Jesus. Light helps us see things. Jesus gives us the truth about God and about life, our origin, and our destiny. Light guides us as we travel. Jesus guides us safely through life to our heavenly home. Light promotes growth and life. Jesus brings us everlasting life. Light warms and comforts. Jesus welcomes us and calms us. Light prevents crime. Jesus is goodness itself. Light dispels darkness, which stands for evil. Jesus pierces the darkness of sin and death and conquers them. All the darkness in the world cannot put out one candle flame. Jesus cannot be overcome by evil.
Take note, that we take a candle or lamp or torch into a room to dispel the darkness. Likewise, the Light of Jesus Christ has to be taken into the darkness of sin that engulfs the hearts and lives of those who are not following Him. That’s the condition behind having this Light ~~that we follow Him. If we do not follow Him, we will not have this light, this truth, this eternal life.
So Jesus said to them, “The Light is among you [only] a little while longer. Walk while you have the Light [keep on living by it], so that darkness will not overtake you. He who walks in the darkness does not know where he is going [he is drifting aimlessly]. John 12:35 amp