As a metaphysician, few have equalled him. What he added to the science, has ever since remained a part of it, which can be said of scarcely another. He advanced more that was new, fortified old positions more ably, and applied speculation to religion more usefully than any before him. Our language furnishes no profounder thinking. Merely to understand him is an honorable distinction, and requires no small previous training of the power of attention. As a polemic, he is keen, sagacious, candid, patient, persevering, calm, inventive, and profound: every page indicates that repose of mind, which belongs only to true greatness, combined with a full knowledge of the subject. So far as I am able to judge, he never presses a consideration beyond its just limits, and seldom introduces an illustration which has not the force of an argument. Fallacies he seems to abolish at a touch. The Analogy employed much of his life. It was begun in his twentieth year, but was not published till he was forty-five. Such a mode of writing never makes large books, for the matter, constantly revised, becomes constantly condensed. The Analogy is so condensed, as that to make a satisfactory synopsis is scarcely practicable. Hence, though my Conspectus and notes have aided my pupils to understand and remember the argument, they do not in any measure obviate the necessity of studying the book itself. If they do not increase the number of those who shall studiously peruse the book itself, my aim and expectations will be disappointed. To this work no reply has ever been attempted! Extensive as is its diffusion, and great as is its acknowledged influence, infidelity has had the highest inducements to attempt to set it aside. Written for a present purpose, and most signally accomplishing it, it is yet so written as to endure, in full value, through all coming time. It is undoubtedly “the most original and the most profound work extant, in any language, on the philosophy of religion,”[4] “the most argumentative and philosophical defence of Christianity ever submitted to the world.”[5]