Now the question is, What is this great principle, obedience to which implies a full discharge of all obligation, actual and conceivable; the principle which comprehends all other principles of the Moral law, and of which each particular precept is only the enunciation of this one common principle in its endlessly diversified applications? This principle has been announced in forms somewhat different, by different philosophers. I will present two or three of these forms. The first that I notice is this. _It shall be the serious intention of all moral agents to esteem and treat all persons, interests, and objects according to their perceived intrinsic and relative importance, and out of respect for their intrinsic worth, or in obedience to the idea of duty, or moral obligation._ Every one will readily apprehend, that the above is a correct enunciation of the principle under consideration. It expresses the fundamental reason why obedience to each and every moral principle is binding upon us. The reason and only reason why we are bound to love God with _all the heart_, is the intrinsic and relative importance of the object presented to the mind in the contemplation of the Infinite and Perfect. The reason why we are bound to love our neighbor as ourselves, is the fact, that his rights and interests are apprehended, as of the same value and sacredness as our own. In the intention under consideration, all obligation, actual and conceivable, is really met. God will occupy his appropriate place in the heart, and the creature his. No real right or interest will be dis-esteemed, and each will intentionally command that attention and regard which its intrinsic and relative importance demands. Every moral agent is under obligation infinite ever to be under the supreme control of such an intention, and no such agent can be under obligation to be or to do anything more than this. The same principle has been announced in a form somewhat different by Kant, to wit: "So act that thy maxim of Will (intention) might become law in a system of universal moral obligation"--that is, let your controlling intention be always such, that all Intelligents may properly be required ever to be under the supreme control of the same intention. By Cousin, the same principle is thus announced: "The moral principle being universal, the sign, the external type by which a resolution may be recognized as conformed to this principle, is the impossibility of not erecting the immediate motive (intention) of the particular act or resolution, into a maxim of universal legislation"--that is, we cannot but affirm that every moral agent in existence is bound to act from the same motive or intention.