'Darkness' in the Bible

And this is the message which we have heard from him and announce to you, that God is light and there [is] no darkness in him at all.

If we say that we have fellowship with him and walk in the darkness, we lie and do not practice the truth.

Again, I am writing a new commandment to you, which is true in him and in you, because the darkness is passing away and the true light already is shining.

The one who says [he] is in the light and hates his brother is in the darkness until now.

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