Why do people reject or refuse to come to the light?
They love their sin. They take pleasure in their sin and are happy in the dark.
This is the verdict: Light has come into the world, but people loved darkness instead of light because their deeds were evil. Everyone who does evil hates the light, and will not come into the light for fear that their deeds will be exposed. John 3:19-20
But there are consequences to be had. He has given Jesus the authority to judge those who reject the light.
The wrath of God is being revealed from heaven against all the godlessness and wickedness of people, who suppress the truth by their wickedness... Romans 1:18
Moreover, the Father judges no one, but has entrusted all judgment to the Son...And he has given him authority to judge because he is the Son of Man. John 5:22, 27
There will be a time where EVERYone will acknowledge Him, though they some are in darkness now.
Therefore God exalted him to the highest place and gave him the name that is above every name, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth...Philippians 2:9-10
In Jesus, we see God. We see what God is like, what His character is, what He thinks, what His will is when we look at Jesus.
(From today's sermon, Pastor Zac Nazarian, Hope Chapel Church, Hermosa Beach)
In the Light by DCTalk In the Light lyrics (if you want to follow)