Bless the Lord, O my soul. Repetition, in Holy Scripture, is almost always for the sake of emphasis. It is not "vain repetition." Our Lord often uses it: "Verily, verily, I say unto you;" "My God, my God, why hast thou forsaken me?
…. Feed my sheep … Feed my sheep." And forget not all his benefits (comp. Deuteronomy 6:12; Deuteronomy 8:11, Deuteronomy 8:14, etc.). Man is so apt to "forget," that he requires continual exhortation not to do so.