The first two letters encourage Christians to keep walking in the light and to fight against the encroachment of apostasy.

KEEP WALKING IN THE LIGHT AND IN LOVE AND BY FAITH

(1 John 1:1–5:21)

Intended for the entire association of those in union with the Christ, John’s first letter provides sound counsel designed to help Christians take their stand against apostasy and remain firm for the truth and for righteousness. He stresses the need to keep walking in the light and in love and by faith.

“If we are walking in the light as [God] himself is in the light,” John writes, “we do have a sharing with one another.” And since God is the Source of love, the apostle says: “Let us continue loving one another.” While “the love of God” moves us to “observe his commandments,” we conquer the world through “our faith” in Jehovah God, his Word, and his Son.​—1 John 1:7; 4:7; 5:3, 4.