Psalms 51:16 - Albert Barnes' Notes on the Bible

For thou desirest not sacrifice ... - On the words rendered in this verse “sacrifice” and “burnt-offering,” see the notes at Isaiah 1:11. On the main sentiment here expressed - that God did not “desire” such sacrifices - see the notes at Psalms 40:6-8. The idea here is, that any mere external offering, however precious or costly it might be, was not what God required in such cases. He demanded the expression of deep and sincere repentance; the sacrifices of a contrite heart and of a broken spirit: Psalms 51:17. No offering without this could be acceptable; nothing without this could secure pardon. In mere outward sacrifices - in bloody offerings themselves, unaccompanied with the expression of genuine penitence, God could have no pleasure. This is one of the numerous passages in the Old Testament which show that the external offerings of the law were valueless unless accompanied by the religion of the heart; or that the Jewish religion, much as it abounded in forms, yet required the offerings of pure hearts in order that man might be acceptable to God. Under all dispensations the real nature of religion is the same. Compare the notes at Hebrews 9:9-10. The phrase “else would I give it,” in the margin, “that I should give it,” expresses a willingness to make such an offering, if it was required, while, at the same time, there is the implied statement that it would be valueless without the heart.