In physical science there is much that has a direct influence on the growth and vigor of moral science. In fact, Nature does much more for the welfare and education of man than he does for himself. The mountains elevate his thoughts, and teach him moral sublimity. The vast ocean, apparently shoreless, suggests to him the idea of eternity and a future life. The earthquake, the hurricane, and the lightning inspire him with a belief in the existence of a supreme Power, a divine Governor of the universe. Thus impressed with a sense of his own weakness and dependence, man naturally implores protection, and trusts in the beneficence and in the clemency of the great Invisible. Hence his faith, his hope, his aspirations. In this way was laid the primitive foundation of his creed and religious tendencies. And yet his weakest passion would seem to be his strongest,--a desire not only to perpetuate himself beyond this life, but to acquire superhuman power. It is for this that he struggles, erects altars, and solicits aid from visionary as well as from divine sources. Whether the perfection of mankind be the end and aim of Nature, need not be questioned. It is evident that she regards man as a favorite, and for this reason solicits him to accept the lessons of wisdom which are ever falling from her lips. In the plenitude of her love she attempts to lead him upward into a broader and a holier sphere. If man was able to trace his descent and ascertain his origin, do you think he would find it in the ape, as Darwin affirms, or in the dust of the earth? Revelation replies, In the dust; and a sound philosophy confirms the fact. Nature never stultifies herself, nor does she develop a new species of animal or plant from an existing species, but doubtless encourages "natural selection" in the line of each distinct species, and by so doing promotes progress in her grand scheme of attaining perfection; nor can it be doubted that from new conditions a new species may appear. In fact, every living thing is born of its appropriate conditions, and will continue to propagate its kind so long as its appropriate conditions exist. When conditions change, results change. In this way a new species of plant or animal may be, and perhaps often is, generated. The process is simply one of change in the relation of the requisite life-elements,--a process which results from the unceasing operation of a great natural law. In Nature there is nothing constant but change.