'Light' 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.

But if we walk in the light as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.

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.

The one who loves his brother resides in the light, and [there] is no cause for stumbling in him.