"The lectures were prepared more especially for the students of our theological seminaries and delivered as a part ot fhe program of the National Federated Evangelistic Committee of which the author was formerly General Secretary. They were delivered to the students of Princeton Theological Seminary and later to those of Xenia Theological Seminary and elsewhere, including the students of the Moody Bible Institute, and they are put in this permanent form with very little modification from the original form and phraseology in which they were delivered at the very urgent petition of the many students who heard them." - p. [6].