This is the message which we have heard from him and announce to you, that God is light, and in him is no darkness at all.
And in him is no darkness at all - This language is much in the manner of John, not only affirming that a thing is so, but guarding it so that no mistake could possibly be made as to what he meant. Compare John 1:1-3. The expression here is designed to affirm that God is absolutely perfect; that there is nothing in him which is in any way imperfect, or which would dim or mar the pure splendor of his character, not even as much as the smallest spot would on the sun. The language is probably designed to guard the mind from an error to which it is prone, that of charging God with being the Author of the sin and misery which exist on the earth; and the apostle seems to design to teach that whatever was the source of sin and misery, it was not in any sense to be charged on God. This doctrine that God is a pure light, John lays down as the substance of all that he had to teach; of all that he had learned from him who was made flesh. It is, in fact, the fountain of all just views of truth on the subject of religion, and all proper views of religion take their origin from this.