4. The absurdity of attempting to act in conformity to this principle, in reference to particular duties, will show clearly that it cannot be the standard of moral obligations in any instance. Suppose an individual becomes convinced that it is his duty, that is, that God requires him to walk or travel a given distance, or for a time to compose himself for the purpose of sleeping. Now he must will with all his heart to perform the duty before him. What if he should judge himself bound to will to sleep, for example, and to will it with all possible intensity, or with as great an intensity as consists with his health? How long would it take him to compose himself to sleep in this manner? What if he should with all possible intensity will to walk? What if, when with all sincerity, he had intended to perform, in the best manner, the duty devolved upon him, he should inquire whether the intention possessed the requisite intensity? It would be just as rational to apply this standard in the instances under consideration, as in any other. 5. That _Sincerity_, and not intensity of intention, presents the true standard of moral judgment, is evident from the fact, that the former commends itself to every man's conscience as perfectly intelligible, of ready definition in itself, and of consequently ready application, in determining the character and moral desert of all moral actions. We can readily conceive what it is to yield all our powers and interests to the Will of God, and to do it with the sincere intention of employing them in the wisest and best manner for the accomplishment of the highest good. We can conceive, too, what it is to employ our powers and interests under the control of such an intention. We can also perceive with perfect distinctness our obligation to live and act under the supreme control of such an intention. If we are bound to yield to God at all, we are bound to yield our entire being to his supreme control. If we are bound to will and employ our powers and resources to produce any good at all, we are bound to will and aim to produce the highest good. This principle also is equally applicable in, determining the character and deserts of all moral actions. Every honest mind can readily determine the fact, whether it is or is not acting under the supreme control of the intention under consideration. If we adopt this principle, as expressing the meaning of the command requiring us to love with _all_ the heart, perfect sunlight rests upon the Divine law. If we adopt any other standard, perfect midnight hangs over that law.