Human reason and Divine Revelation are two means by which truth is manifested to man; they cannot contradict one another; as a matter of fact, that which is evident to reason is never found in conflict with Revelation. -from the Introduction Intended as a textbook for Catholic schools and seminaries, this compact guide to modern philosophy explored from a Catholic perspective covers: . Syllogisms . Method in reasoning . Truth and falsity . Means of attaining certainty . Common sense . The nature of being . The origin of the world . The nature of the human soul . The physical and metaphysical essence of God This little book became one of the foundations of modern Catholic philosophy when it was first published in 1891, and it continues to hold dramatic sway over contemporary Christians, its pronouncements on morality fueling the arguments of religious activists in the moral debates dividing our society today. American Jesuit scholar CHARLES COPPENS is also the author of A Brief Text-book of Moral Philosophy (1896) and Moral Principles and Medical Practice (1897).