God does not here absolutely disparage sacrifice, which is as old and universal as sin (Gen 3:21; Gen 4:4), and sin is almost as old as the world; but sacrifice, unaccompanied with obedience of heart and life (1Sa 15:22; Psa 50:9-13; Psa 51:16-19; Hos 6:6). Positive precepts are only means; moral obedience is the end. A foreshadowing of the gospel, when the One real sacrifice was to supersede all the shadowy ones, and “bring in everlasting righteousness” (Psa 40:6, Psa 40:7; Dan 9:24-27; Heb 10:1-14).
full - to satiety; weary of
burnt offerings - burnt whole, except the blood, which was sprinkled about the altar.
fat - not to be eaten by man, but burnt on the altar (Lev 3:4, Lev 3:5, Lev 3:11, Lev 3:17).