“It would be presumptuous to call this work a phi­losophy of religion, but it is a first step in that direc­tion. There is a reciprocal relation between science and religion which I try to trace in parts one and two, intending to show that neither can maintain itself in adequate manner without the other. In part three I endeavor to clear away from the face of religion what I believe to be certain present-day misinterpre­tations of it and to state my own view of its function in human living.”  —From the Preface to this Edition