The results of our study of the various hypotheses which have been offered in explanation of the religious phenomena of the world may be summed up as follows: The first and second theories we have rejected as utterly false. Instead of being faithful to and adequately explaining the facts, they pervert, and maltreat, and distort the facts of religious history. The last three each contain a precious element of truth which must not be undervalued, and which can not be omitted in an explanation which can be pronounced complete. Each theory, taken by itself, is incomplete and inadequate. The third hypothesis overrates _feeling_; the fourth, _reason_; the fifth, _verbal instruction_. The first extreme is Mysticism, the second is Rationalism, the last is Dogmatism. Reason, feeling, and faith in testimony must be combined, and mutually condition each other. No purely rationalistic hypothesis will meet and satisfy the wants and yearnings of the heart. No theory based on feeling alone can satisfy the demands of the human intellect. And, finally, an hypothesis which bases all religion upon historical testimony and outward fact, and despises and tramples upon the intuitions of the reason and the instincts of the heart can never command the general faith of mankind. Religion embraces and conditionates the whole sphere of life--thought, feeling, faith, and action; it must therefore be grounded in the entire spiritual nature of man. Our criticism of opposite theories has thus prepared the way for, and obviated the necessity of an extended discussion of the hypothesis we now advance. _The universal phenomenon of religion has originated in the à priori apperceptions of reason, and the natural instinctive feelings of the heart, which, from age to age, have been vitalized, unfolded, and perfected by supernatural communications and testamentary revelations_. There are universal facts of religious history which can only be explained on the first principle of this hypothesis; there are special facts which can only be explained on the latter principle. The universal prevalence of the idea of God, and the feeling of obligation to obey and worship God, belong to the first order of facts; the general prevalence of expiatory sacrifices, of the rite of circumcision, and the observance of sacred and holy days, belong to the latter. To the last class of facts the observance of the Christian Sabbath, and the rites of Baptism and the Lord's Supper may be added.