In John 8:12, Jesus spoke and said that He was the “Light of the World” which He expands upon in John 12:46; (AMPC), “I have come as a light into the darkness, so that whoever believes in Me
(whoever cleaves to and trusts in and relies on Me) may not continue to live in darkness.” (See also, John 8:12 and John 9:5).
Thinking in natural terms, what does light do? It shows us the way clearly (Psalm 119:105) and it dispels darkness (John 1:5). This is exactly what Jesus did and what He is still doing. He guides us one step at a time so we won’t stumble or take the wrong path.
Not only did Jesus say He was the light of the world but He also said that we are the light of the world! (Matt 5:14). Also, in Eph 4:8 we learn that we must, “walk as children of Light (lead the lives of those native-born to the Light)” (AMPC). The very next verse tells us how to do that, “in every form of kindly goodness, uprightness of heart and trueness of Life” (Eph 4:9; AMPC). In other words, we need to let our light shine so non-Christians can see Jesus in us. “In the same way let your light shine before others, so that they may see your good works and give glory to your Father in heaven” (Matt 5:16; CSB).
As you meditate on these verses bear in mind that the light in Jesus is so bright that in the New Jerusalem, “The city has no need of sun nor of the moon to give light to it, for the splendour and radiance (glory) of God illuminate it, and the Lamb is its lamp” (Rev 21:23; AMPC). Hallelujah!