One consequence of the principle on which this Essay has been framed is an endeavour to place before the reader's eye different modes of reasoning in the language of their several authors. The method of looking at any subject-matter in a diversity of lights naturally leads to copiousness of quotation. There can, it is evident, be no varieties of thought so undeniably distinct as those which are the actual products of diverse minds. The maxim which has governed the following selection is what Bacon would call a marshalling Idea. They posit one central thought and throw light upon it from a circle of separate reflectors. Let it be observed that such a collection of opinions implies no appeal to authority in the narrow sense of the word. There is indeed a manifest distinction between authority and authorities--and our present appeal is to the latter. No man's _ipse dixit_ can dogmatically settle questions which belong to an inquirer's responsible self; but it is surely the wisdom of every one who acknowledges the awful sense of accountability attendant on the determination of questions affecting his central beliefs, to weigh the reasonings of others who have felt the same deep impression of their paramount importance. If any one is reluctant so to do from an idea that by doing thus much he pays a wrongful deference to prejudices, he has in truth assumed the whole issue which he is bound to examine. How otherwise can he certainly allege that the prejudice is not inherent within himself? Reluctance of this kind would on the present occasion be thoroughly misplaced. Authorities as here quoted are neither more nor less than the opinions of experts who have a title to be heard each in his own proper department. Throughout the practical conduct of life we all experience the benefit of laying aside our private spectacles from time to time and of looking through the glasses of other men. And in questions such as the one now before us, is it possible to do better than try whether we can see for ourselves what has been pronounced discernible by men who contemplated this world of ours with more than ordinary powers of vision? The present writer has a personal interest in bringing together the reflections of many who have reached the same resting-place along various lines of approach, and who have expressed their conclusions with some diversity of language. He has ventured himself on viewing the evidences of Natural Theology from a position by no means identical with that most commonly occupied by Natural Theologians. The student, therefore, who takes a wide survey of the field will be the critic best prepared to examine the latter part of this Essay.