Originally published in 1910, this is a volume of philosophy by an author who found his main calling in the creation of novels, Charles Francis Keary (1848–1917). Unusual in its relatively personal exploration of ideas, together with its accessible, literary style, the text nonetheless maintains an academically rigorous approach to its exploration of the boundaries of reason. The fundamental premise is that mental processes generally thought to be based on intuition can, more accurately, be seen to find their basis in reasoning; this premise, in turn, forms the basis for an exposition of Keary's philosophy of life and religion. This is a highly readable, and critically underrated, book that will be of value to anyone with an interest in philosophy and theology.