When Leo XIII. made his recommendation of St. Thomas it was not as one who had merely heard of the works of the great medieval thinker, or knew them only by tradition, or had slightly dipped into them as a dilettante, but as one who had been long familiar with them, who had studied the Angelical Doctor in youth, who had pondered his wisdom in middle age, and resorted again and again to him for guidance in the difficulties of doctrine in maturer years, and the difficulties of morals such as presented themselves in his practical life as a churchman. It was out of the depths of his knowledge of him, that the great Pope, whom all the modern world came to honor so reverently before his death, drew his supreme admiration for St. Thomas and his recognition of the fact that no safer guide in the thorny path of modern Christian apologetics could be followed, than this wonderful genius who first systematized human thought as far as the relations of Creator to creature are considered, in the heyday of medieval scholarship and university teaching. Those who have their knowledge of scholastic philosophy at second hand, from men who proclaim this period of human development as occupied entirely with fruitless discussion of metaphysical theories, will surely think that they could find nothing of interest for them in St. Thomas's writings. It is true the casual reader may not penetrate far enough into his writing to realize its significance and to appreciate its depth of knowledge, but the serious student finds constant {276} details of supreme interest because of their applications to the most up-to-date problems. We venture to quote an example that will show this more or less perfectly according to the special philosophic interest of readers. It is St. Thomas's discussion of the necessity there was for the revelation of the truth of the existence of God. His statement of the reasons why men, occupied with the ordinary affairs of life, would not ordinarily come to this truth unless it were revealed to them, though they actually have the mental capacity to reach it by reason alone, will show how sympathetically the Saint appreciated human conditions as they are.