'Light' in the Bible

This then is the message which we have heard of him, and declare unto 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 one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.

Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.

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

He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.