John 11:9-10
Jesus answered: Are there not twelve hours in the day? If any one walks during the day,, he does not stumble, for he sees the light of this world.
John 12:35
Then Jesus said to them: Yet a little while is the light with you: walk while you have the light, lest the darkness overtake you. For he that walks in the darkness knows not whither he goes.
John 12:40
He has blinded their eyes, and hardened their heart, lest they should see with their eyes, and understand with their heart, and should turn, and I should give them health.
1 John 2:11
He that hates his brother is in darkness, and walks in darkness; and he knows not whither he goes, because darkness has blinded his eyes.