This idea of the absolute worth of mere Will, though it is allowed even by the vulgar understanding, he seeks to establish beyond dispute, by an argument from the natural _subjection_ of Will to Reason. In a being well-organized, if Conservation or Happiness were the grand aim, such subjection would be a great mistake. When Instinct could do the work far better and more surely, Reason should have been deprived of all practical function. Discontent, in fact, rather than happiness comes of pursuit of mere enjoyment by rational calculation; and to make light of the part contributed by Reason to happiness, is really to make out that it exists for a nobler purpose. But now, since Reason _is_ a practical faculty and governs the will, its function can only be to produce a Will good in itself. Such a Will, if not the only good, is certainly the highest; and happiness, unattainable by Reason as a primary aim, and subject in this life altogether to much limitation, is to be sought only in the contentment that arises from the attainment by Reason of its true aim, at the sacrifice often of many a natural inclination. He proceeds to develop this conception of a Will in itself good and estimable, by dealing with the commonly received ideas of Duty. Leaving aside profitable actions that are plain violations of duty, and also actions conformed to duty, but, while not prompted directly by nature, done from some special inclination--in which case it is easy to distinguish whether the action is done from duty or from self-interest; he considers those more difficult cases where the same action is at once duty, and prompted by direct natural inclination. In all such, whether it be duty of self-preservation, of benevolence, of securing one's own happiness (this last a duty, because discontent and the pressure of care may easily lead to the transgression of other duties), he lays it down that the action is not allowed to have true moral value, unless done in the abeyance or absence of the natural inclination prompting to it. A second position is, that the moral value of an action done from duty lies not in the intention of it, but in the maxim that determines it; not in the object, but in the _principle of Volition_. That is to say, in action done out of regard to duty, the will must be determined by its _formal à priori_ principle, not being determined by any _material à posteriori_ motive. A third position follows then from the other two; Duty is the necessity of an action out of respect for Law. Towards an object there may be inclination, and this inclination may be matter for approval or liking; but it is Law only--the ground and not the effect of Volition, bearing down inclination rather than serving it--that can inspire _Respect_. When inclination and motives are both excluded, nothing remains to determine Will, except Law objectively; and, subjectively, pure respect for a law of practice--_i.e._, the maxim to follow such a law, even at the