From the main difference here pointed out, a minor collateral difference ramifies. Of whatever ought to be paid or done, payment or performance may be righteously enforced. Here I have the satisfaction of proceeding for a few steps side by side with Mr. Mill, although only, I am sorry to say, to part company again immediately. 'It is a part,' he says, 'of the notion of duty in every one of its forms that a person may rightfully be compelled to fulfil it. Duty is a thing which may be _exacted_ from a person as one exacts a debt. Unless we think it may be exacted from him, we do not call it his duty.'[15] Now, since justice never asks for anything but what is due, never makes a requisition compliance with which is not a duty, it follows that all those persons to whom its requisitions are addressed may be rightfully compelled to comply with them, whereas, since what every other virtue requires is always something not due, compliance with its requisitions is never a duty, and cannot, except unrighteously, be enforced. This--viz., the rightfulness of using compulsion in aid of justice, as contrasted with the wrongfulness of resorting to it in aid of generosity, rather than the rightfulness of punishing breaches of the one and not of the other, seems to me the 'real turning-point of the distinction' between the two. For gross disregard of generosity, and indeed of any other virtue, may rightfully be punished, justice fully sanctioning the punishment although indicating also the nature of the penalty to be inflicted in each case, and restricting it within certain limits. Whoever plays the dog in the manger in a manger of his own, or makes an exclusively selfish use of his wealth or other advantages, refusing to do good to his neighbour at however little sacrifice on his own part it might be done, is not thereby infringing anybody else's rights, or thereby wronging any one else. He is only exercising his own undoubted rights. Still he is exercising them in a manner deserving of severe reprobation, and which witnesses of his conduct may justly punish by testifying to him the scorn, disgust, or indignation he has excited. It is no more than just that he should have his deserts and receive the punishment which has become his due. But justice, although permitting him to be punished for acting ungenerously, does not sanction his being compelled to make a show of acting generously. If his conduct had been unjust instead of simply ungenerous, no punishment would be adequate that did not force him to repair the evil he had done, or to do the good he had left undone. But the most flagrant breach of generosity, neither keeping nor taking away anything to which any one has a right, does nothing for which reparation can be due. It consists simply in a man's making an exclusively selfish use of what is exclusively his, and to make such use is one of the rights of property. Whoever exercises that odious right is