Gentlemen, in these Lectures I shall be loyal to the principles of impartial scholarship to which I understand this Chair to be consecrated. Expect neither theological controversy nor dogmatic discussion of any kind from me. It is as a historian that I am here, and as a historian I shall speak. Only let me say at once, that, while retaining my own very marked preferences, I place religion itself, as a faculty, an attribute, a tendency natural to the human mind, above all the forms, even the most exalted, which it has assumed in time and space. I can conceive a _Templum Serenum_ where shall meet in that love of truth, which at bottom is but one of the forms of love of God, all men of upright heart and pure will. To me, religion is a natural property and tendency, and consequently an innate need of the human spirit. That spirit, accidentally and in individual cases, may indeed be deprived of it; but if so, it is incomplete, mutilated, crippled. But observe that the recognition of religion itself (in distinction from the varied forms it may assume), as a natural tendency and essential need of the human mind, implies the reality of its object, even if that sacred object should withdraw itself from our understanding behind an impenetrable veil, even could we say nothing concerning it save this one word: IT IS! For it would be irrational to the last degree to lay down the existence of such a need and such a tendency, and yet believe that the need corresponds to nothing, that the tendency has no goal. Religious history, by bringing clearly into light the universality, the persistency and the prodigious intensity of religion in human life, is therefore, to my mind, one unbroken attestation to God. And now it remains for me to express my lively regret that I am unable to address you in your own tongue. I often read your authors: I profit much by them. But I have emphatically not received the gift of tongues. By such an audience as I am now addressing, I am sure to be understood if I speak my mother-tongue; but were I to venture on mutilating yours, I should instantly become completely unintelligible! Let me throw myself, then, upon your kind indulgence. I. I am about to speak to you on a subject little known in general, though it has already been studied very closely by specialists of great merit--I mean the religions professed in Mexico and Peru when, in the sixteenth century, a handful of Spanish adventurers achieved that conquest, almost like a fairy tale, which still remains one of the most extraordinary chapters of history. But I shall perhaps do well at the outset briefly to explain the very special importance of these now vanished religions.