The difference between the law of reciprocity and the law of beneficence is that in the former a person is justified in giving measure for measure, and in the latter one is supposed to tolerate and to forgive and to show kindness, so that the enemy may grow to be a friend. There are cases where one cannot show kindness; but yet one can be tolerant. There are cases where one cannot forgive; and yet revenge, for a humane person, is an unnatural thing. One can overlook the faults of another; and by that one will give less occasion for disagreement and still less occasion for enmity.