'Darkness' in the Bible

This is the message that we have heard from him and declare to you: God is light, and in him there is no darkness none at all!

If we claim that we have fellowship with him but keep living in darkness, we are lying and not practicing the truth.

On the other hand, I am writing to you a new commandment that is truly in him and in you. For the darkness is fading away, and the true light is already shining.

The person who says that he is in the light but hates his brother is still in the darkness.

But the person who hates his brother is in the darkness and lives in the darkness. He does not know where he is going, because the darkness has blinded his eyes.