It remains for us to consider *the obligations imposed by an acknowledged revelation from God*. The position in which we are placed by such a revelation may best be illustrated by reference to what takes place in every human family. A judicious father’s commands, precepts, or counsels to his son are of two kinds. In the first place, he lays emphatic stress on duties which the son knows or might know from his own sense of the fitting and the right, such as honesty, veracity, temperance. These duties will not be in reality any more incumbent on the son because they are urged upon him by his father; but if he be a son worthy of the name, he will be more profoundly impressed by their obligation, and will find in his filial love an additional and strong motive toward their observance. The father will, in the second place, prescribe either for his son’s benefit or in his own service certain specific acts, in themselves morally indifferent, and these, when thus prescribed, are no longer indifferent, but, as acts of obedience to rightful authority, they become fitting, right, obligatory, and endowed with all the characteristics of acts that are in themselves virtuous. Now a revelation naturally would, and the Christian revelation does, contain precepts and commands of both these classes. It prescribes with solemn emphasis the natural virtues which are obligatory upon us on grounds of intrinsic fitness; and though these are not thus made any the more our duty, we have, through the teachings and example of Jesus Christ, a more vivid sense of our obligation, a higher appreciation of the beauty of virtue, and added motives to its cultivation derived from the love, the justice, and the retributive providence of God. The Christian revelation, also, contains certain directions, not in themselves of any intrinsic obligation, as, for instance, those relating to baptism and the eucharist. So far as we can see, other and very different rites might have served the same purpose with these. Yet it is fitting and right that these, and not others, should be observed, simply because the Divine authority which enacts them has a right to command and to be obeyed. Duties of this class are commonly called _positive_, in contradistinction from natural obligations. Both classes are equally imperative on the ground of fitness; but with this difference, that in the latter class the fitness resides in the duties themselves, in the former it grows out of the relation between him who gives and those who receive the command. Section II. Duties Of The Family.