On the evening of December 19, 1900, Mr. Fiske delivered in Sanders Theatre, Cambridge, the address here printed. It was given at the request of Harvard University, in accordance with the terms of the Ingersoll lectureship, but it stood clearly in Mr. Fiske's mind as a continuation, and in a sense the completion, of that series of philosophic studies successively issued under the titles, "The Destiny of Man viewed in the Light of his Origin," "The Idea of God as affected by Modern Knowledge," and "Through Nature to God." Mr. Fiske delayed the publication of "Life Everlasting," and it is possible that he designed amplifying it. Yet, as he stated in his Preface to "The Idea of God," that both that book and "The Destiny of Man" were printed exactly as delivered, "without the addition, or subtraction, or alteration of a single word," so he may have intended to print this study in the same way. At any rate it is now printed exactly as it was delivered, his perfectly clear manuscript being carefully followed.