There is but one argument that appears to me to have any real weight, and that is the argument from instinct. Man has faculties which appear, at present, as though they were not born of the intellect, and it seems to me to be unphilosophical to exclude this class of facts from our survey of nature. The nature of man has in it certain sentiments and emotions which, reasonably or unreasonably, sway him powerfully and continually; they are, in fact, his strongest motive powers, overwhelming the reasoning faculties with resistless strength; true, they need discipline and controlling, but they do not need to be, and they cannot be, destroyed. The sentiments of love, of reverence, of worship, are not, as yet, reducible to logical processes; they are intuitions, spontaneous emotions, incomprehensible to the keen and cold intellect. They may be laughed at or denied, but they still exist in spite of all; they avenge themselves, when they are not taken into account, by ruining the best laid plans, and they are continually bursting the cords with which reason strives to tie them down. I do not for a moment pretend to deny that these intuitions will, as our knowledge of psychology increases, be reducible to strict laws; we call them instincts and intuitions simply because we are unable to trace them to their source, and this vague expression covers the vagueness of our ideas. Therefore, intuition is not to be accepted as a trustworthy guide, but it may suggest an hypothesis, and this hypothesis must then be submitted to the stern verification of observed facts. We are not as yet able to say to what the instinct in man to worship points, or what reality answers to his yearning. Increased knowledge will, we may hope, reveal to us* where there lies the true satisfaction of this instinct: so long as the yearning is only an "instinct" it cannot pretend to be logically defensible, or claim to lay down any rule of faith. But still I think it well to point out that this instinct exists in man, and exists most strongly in some of the noblest souls.