*Christianity covers the entire field of human duty*, and reveals many fitnesses, recognized when seen, but discovered by few or none independently of the teachings and example of its Founder; while it gives the emphasis and sanction of a Divine revelation to many other fitnesses, easily discoverable, but liable to be overlooked and neglected. In defining *the relations of the individual human soul to God*, Christianity opens to our view a department of duty paramount to all others in importance and interest. His fatherly love and care, his moral government and discipline, his retributive providence, define with unmistakable distinctness certain corresponding modes, in part, of outward action, and in still greater part, of action in that inward realm of thought whence the outward life receives its direction and impulse. *The brotherhood of the whole human race*, also, reveals obligations which would exist on no other ground; and for the clear and self-evidencing statement of this truth we are indebted solely to Christianity. The visible differences of race, color, culture, religion, and customs, are in themselves dissociating influences. Universal charity is impossible while these differences occupy the foreground. Slavery was a natural and congenial institution under Pagan auspices; nor have we in all ancient extra-Christian literature, unless it be in Seneca (in whom such sentiments may have had indirectly(3) a Christian origin), a single expression of a fellowship broad enough to embrace all diversities of condition, much less, of race. But the Christian, so far as he consents to receive the obvious and undoubted import of Christ’s mission and teachings, must regard all men as, in nature, in the paternal care of the Divine Providence, in religious privileges, rights, and capacities, on an equal footing. With this view, he cannot but perceive the fitness, and therefore the obligation, of many forms of social duty, of enlarged beneficence, of unlimited philanthropy, which on any restricted theory of human brotherhood would be neither fitting nor reasonable.