DEUT1299 "O Lord, who shall sojourn in Thy tent?… He who… swears to his own hurt and changeth not" (Psalm 51:1,4). ... Obviously, a pledge implies that it will be honored even when it may involve considerable loss or discomfort, even when it can be violated with impunity. The Psalmist does not praise the man who merely fulfills a pledge. He praises one who does so when it is to his hurt, and when presumably he could have avoided fulfilling it. Such an act belongs in our category of the moral.