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.
Verse 7. But if we walk in the light. . Walking in the light may include the three following things: (1.) Leading lives of holiness and purity; that is, the Christian must be characteristically a holy man, a light in the world, by his example.
The apostle, having declared the truth and dignity of the author of the gospel, brings a message or report from him, from which a just conclusion is to be drawn for the consideration and conviction of the professors of religion, or professed entertainers of this glorious gospel. I.
Commenting on 1 John 1:5-7
Note here, 1. The pollution and uncleanness of sin implied and supposed in the word cleansing; sin is the great pollution and defilement of the soul, and universal pollution, an abiding pollution, a mortal pollution, and yet an insensible pollution. Note, 2.