That a religious destination appertains to man as man, whether he has been raised to a full religious consciousness, or is simply considered as capable of being so raised, can not be denied. In all ages man has revealed an instinctive tendency, or natural aptitude for religion, and he has developed feelings and emotions which have always characterized him as a religious being. Religious ideas and sentiments have prevailed among all nations, and have exerted a powerful influence on the entire course of human history. Religious worship, addressed to a Supreme Being believed to control the destiny of man, has been coeval and coextensive with the race. Every nation has had its mythology, and each mythologic system has been simply an effort of humanity to realize and embody in some visible form the relations in which it feels itself to be connected with an external, overshadowing, and all-controlling Power and Presence. The voice of all ancient, and all contemporaneous history, clearly attests that the _religious principle_ is deeply seated in the nature of man; and that it has occupied the thought, and stirred the feelings of every rational man, in every age. It has interwoven itself with the entire framework of human society, and ramified into all the relations of human life. By its agency, nations have been revolutionized, and empires have been overthrown; and it has formed a mighty element in all the changes which have marked the history of man. This universality of religious sentiment and religious worship must be conceded as a fact of human nature, and, as a universal fact, it demands an explanation. Every event must have a cause. Every phenomenon must have its ground, and reason, and law. The facts of religious history, the past and present religious phenomena of the world can be no exception to this fundamental principle; they press their imperious demand to be studied and explained, as much as the phenomena of the material or the events of the moral world. The phenomena of religion, being universally revealed wherever man is found, must be grounded in some universal principle, on some original law, which is connate with, and natural to man. At any rate, there must be something in the nature of man, or in the exterior conditions of humanity, which invariably leads man to worship, and which determines him, as by the force of an original instinct, or an outward, conditioning necessity, to recognize and bow down before a Superior Power. The full recognition and adequate explanation of the facts of religious history will constitute a _philosophy of religion_. The hypotheses which have been offered in explanation of the religious phenomena of the world are widely divergent, and most of them are, in our judgment, eminently inadequate and unsatisfactory. The following enumeration may be regarded as embracing all that are deemed worthy of consideration.