Calvin's commentary on Ps 17.4

John Calvin, on Psalms 17.4 (boldface mine), "David ... intended to declare, that although wicked and malicious men provoked him to evil, he had, nevertheless, been always restrained by the word of God, so that he kept himself from exercising violence and inflicting injuries, or from rendering evil for evil. He therefore tells us, that whatever may have been the works of men, he had been always so devoted to the word of God, and so hung, as it were, upon his mouth, that he could not think of allowing himself, when provoked by the injuries his enemies inflicted on him, to act towards them as they acted towards him. We know how severe a temptation it is, and how difficult to overcome, to disregard the manner in which men behave themselves towards us, and to consider only what God forbids or commands us. Even those who are naturally inclined to gentleness and humanity, who desire to do good to all men, and wish to hurt nobody, whenever they are provoked, burst forth into a revengeful mood, carried away by a blind impetuosity; especially when we see all right and equity overthrown, the confusion so blinds us, that we begin to howl with the wolves. If, therefore, we would have a good rule for governing ourselves, when our enemies, by their mischievous actions, provoke us to treat them in a similar manner, let us learn, after the example of David, to meditate upon the word of God, and to keep our eyes fixed upon it. By this means our minds will be preserved from ever being blinded, and we shall always avoid the paths of wickedness, seeing God will not only keep our affections under restraint by his commandments, but will also train them to patience by his promises. He withholds us from doing evil to our neighbors, not only by forbidding us, but by declaring, at the same time, that he will take into his own hand the execution of vengeance on those who injure us, he admonishes us to “give place unto wrath.”