'Darkness' in the Bible

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

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

Again, a new commandment write I unto you, which thing is true in him and in you; because the darkness is passing away, and the true light already shineth.

He that saith he is in the light and hateth his brother, is in the darkness even until now.

But he that hateth his brother is in the darkness, and walketh in the darkness, and knoweth not whither he goeth, because the darkness hath blinded his eyes.