What is hardly less important, these are the precepts which mankind have the strongest and the most direct inducements for impressing upon one another.  By merely giving to each other prudential instruction or exhortation, they may gain, or think they gain, nothing:  in inculcating on each other the duty of positive beneficence they have an unmistakeable interest, but far less in degree:  a person may possibly not need the benefits of others; but he always needs that they should not do him hurt.  Thus the moralities which protect every individual from being harmed by others, either directly or by being hindered in his freedom of pursuing his own good, are at once those which he himself has most at heart, and those which he has the strongest interest in publishing and enforcing by word and deed.  It is by a person’s observance of these, that his fitness to exist as one of the fellowship of human beings, is tested and decided; for on that depends his being a nuisance or not to those with whom he is in contact.  Now it is these moralities primarily, which compose the obligations of justice.  The most marked cases of injustice, and those which give the tone to the feeling of repugnance which characterizes the sentiment, are acts of wrongful aggression, or wrongful exercise of power over some one; the next are those which consist in wrongfully withholding from him something which is his due; in both cases, inflicting on him a positive hurt, either in the form of direct suffering, or of the privation of some good which he had reasonable ground, either of a physical or of a social kind, for counting upon.

The same powerful motives which command the observance of these primary moralities, enjoin the punishment of those who violate them; and as the impulses of self-defence, of defence of others, and of vengeance, are all called forth against such persons, retribution, or evil for evil, becomes closely connected with the sentiment of justice, and is universally included in the idea.  Good for good is also one of the dictates of justice; and this, though its social utility is evident, and though it carries with it a natural human feeling, has not at first sight that obvious connexion with hurt or injury, which, existing in the most elementary cases of just and unjust, is the source of the characteristic intensity of the sentiment.  But the connexion, though less obvious, is not less real.  He who accepts benefits, and denies a return of them when needed, inflicts a real hurt, by disappointing one of the most natural and reasonable of expectations, and one which he must at least tacitly have encouraged, otherwise the benefits would seldom have been conferred.  The important rank, among human evils and wrongs, of the disappointment of expectation, is shown in the fact that it constitutes the principal criminality of two such highly immoral acts as a breach of friendship and a breach of promise.  Few hurts which human beings can sustain are greater, and none wound more,