Walk while you have the light, lest darkness overtake you; John 12.

This He said, signifying by what death He would die. The people answered Him, “We have heard from the law that the Christ remains forever; and how can You say, ‘The Son of Man must be lifted up’? Who is this Son of Man?” Then Jesus said to them, “A little while longer the light is with you. Walk while you have the light, lest darkness overtake you; he who walks in darkness does not know where he is going. While you have the light, believe in the light, that you may become sons of light.” These things Jesus spoke, and departed, and was hidden from them. Therefore they could not believe, because Isaiah said again: “He has blinded their eyes and hardened their hearts, Lest they should see with  their  eyes, Lest they should understand with  their  hearts and turn, So that I should heal them.” Then Jesus cried out and said, “He who believes in Me, believes not in Me but in Him who sent Me. And he who sees Me sees Him who sent Me. I have come as a light into the world, that whoever believes in Me should not abide in darkness. John 12:33-36,39-40,44-46 - NKJV