science of religion, as it pushes its enquiries, may possibly come across—may even already have come across—the lowest form to which it is possible for man to descend. But whether that form is the most primitive as well as the lowest,—still more, whether it is the most primitive because it is the lowest,—will be questions which will not admit of being settled offhand. And in the meantime we are not called upon to answer them in the affirmative as a sine qua non of being admitted students of the science.

The reason for beginning with the lowest forms is—as is proper in a practical science—a practical one. As I have already said, if the missionary is to succeed in his work, he must know and teach the difference and the value of the difference between Christianity and other religions. But difference implies similarity: we cannot specify the points of difference between two things without presupposing some similarity between them,—at any rate sufficient similarity to make a comparison of them profitable. Now, the similarity between the higher forms of religion is such that there is no need to demonstrate it, in order to justify our proceeding to dwell upon the differences. But the similarity between the higher and the lower forms is far from being thus obvious. Indeed, in some cases, for example in the case of some Australian tribes, there is alleged, by some students of the science of religion, to be such a total absence of similarity that we are entitled or compelled to recognise that however liberally, or loosely, we relax our definition of religion, we must pronounce those tribes to be without religion. The allegation thus made, the question thus raised, evidently is of practical importance for the practical purposes of the missionary. Where some resemblances exist between the higher and the lower forms of religion, those resemblances may be made, and should be made, the ground from which the missionary should proceed to point out by contrast the differences, and so to set forth the higher value of Christianity. But if no such resemblances should exist, they cannot be made a basis for the missionary's work. Without proceeding in this introductory lecture to discuss the question whether there are any tribes whatever that are without religion, I may point out that religion, in all its forms, is, in one of its aspects, a yearning and aspiration after God, a search after Him, peradventure we may find Him. And if it be alleged that in some cases there is no search after Him,—that amongst civilised men, amongst our own acquaintances, there is in some cases no search and no aspiration, and that therefore among the more backward peoples of the earth there may also be tribes to whom the very idea of such a search is unknown,—then we must bear in mind that a search, after any object whatever, may be dropped, may even be totally abandoned; and yet the heart may yearn after that which it is persuaded—or, it may be, is deluded into thinking—it can never find. Perhaps, however, that way of putting it may be objected to, on the ground that it is a petitio principii and assumes the very fact it is necessary to prove, viz. that the lowest tribes that are or can be known to us have made the search and given it up, whereas the contention is that they have never made the search. That contention, I will remark in passing, is one which never can be proved. But to those who consider that it is probable in itself, and that it is a necessary stage in the evolution of belief, I would point out that every search is made in hope—or, it may be, in fear—that search presupposes hope and fear. Vague, of course, the hope may be; scarce conscious, if conscious at all, of what is hoped. But without hope, until there are some dim stirrings, however vague, search is unconceivable, and it is in and by the process of search that the hope becomes stronger and the object sought more definite to view. Now, inasmuch as it is doubtful whether any tribe of people is without religion, it may reasonably be held that the vast majority, at any rate, of the peoples of the earth have proceeded from hope to aspiration and to search; and if there should be found a tribe which had not yet entered consciously on the search, the reasonable conclusion would be not that it is exempted from the laws which we see exemplified in all other peoples, but that it is tending to obey the same laws and is starting from the same point as they,—that hope which is the desire of all nations and has been made manifest in the Son of Man.