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.
we have fellowship one with another: To walk in the light is to have fellowship with God, but it also makes possible fellowship with others who walk in that same light. One person suggests that fellowship is first vertical and then horizontal. There must first be fellowship with God before we enjoy fellowship with our brethren. We enter that fellowship with God when we become Christians, and we maintain that fellowship through righteous living. This type of living in turn makes possible a fellowship with a community of believers who share a common faith and religion, as well as common ideals, aims, objectives, purposes, natures, and blessings. All of those who share these commonalities are those who continue to walk in the light.