The existing moral and spiritual condition of mankind is universally admitted to be imperfect. Both believers and unbelievers in revelation alike acknowledge that the attempt to improve it is desirable. No less certain is it that man possesses faculties which can only receive their perfect development in a higher condition of things than the present. These as much point to a higher development of man as the organization of the lower forms of animal life points to the higher and more perfect ones. If, therefore, God be the Creator and moral Governor of the world, a further manifestation of Him is rendered highly probable. This probability may be reasoned out by analogies in the history of the past. Higher developments from lower forms have been the rule. Are they then to cease with man in his present state of imperfection? How man came to be thus imperfect, how his moral degradation has originated, is a question which does not fall within the present argument. It is a fact, by whatever theory it may be attempted to be accounted for. If a rational being had existed in those ages during which there was manifested nothing but the lower forms of life, and had come to the conclusion that the world as it then existed was the work of an intelligent Creator, he would have pronounced it highly probable that the resources of creative power would yet receive a more glorious manifestation. When vertebrate life was first introduced into the world, a careful examination of the state of things would have led to a similar conclusion. But the lower forms of vertebrate life are typical of the higher, and the higher point to man. Before man entered the world a being capable of comprehending the condition of things as then existing would have pronounced it highly probable that there would be yet a further manifestation of creative energy, and that the work required for its consummation the production of rationality.