'Light' in the Bible

And this is the message which we have heard from him, and declare to you, that God is light, and in him is no darkness 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 Christ his Son cleanses us from all sin.

Again, I write a new commandment to you, which thing is true in him and in you, because the darkness is passing and the true light already shines.

He who says he is in the light, and hates his brother, is in the darkness until now.

He that loves his brother abides in light, and there is no occasion of stumbling in him.