The glory of the mind is the possession of two eyes, the eye of sense and the eye of reason. Through the one, it looks out upon the world of matter and fact. Through the other, it beholds the world of idea and relation. The world of matter and fact, seen through the eye of sense, is lifted and transfigured and multiplied a thousandfold when contemplated through the eye of reason. When the literal world is transferred to the ideal world, it takes on hues and dimensions in accordance with the universal and illimitable nature of man. The world which the sense sees, and the world which the reason sees, are both real, and through the mind commerce is kept up between them. Along this mental highway facts make a pilgrimage to the holy land of reason; there they are changed into ideas. Stars are turned into astronomy, atoms into chemistry, rocks into geology, plants into botany, colors into beauty and sounds into harmony. Over the same royal road, ideas pass to the world of sense. There they are changed again into facts. Ideas of beauty, distilled in the alembic of the imagination from the seven prismatic colors, are turned into painting, and Raphael’s “Transfiguration” blesses the world. Ideas of harmony, formed by the power of the imagination from the notes of the musical scale, are turned into song, and Handel’s “Messiah” agitates the thoughts and feelings of men with the melody of the skies. Ideas of form, deduced from the contemplation of the shapes of things, are turned into sculpture, and Michael Angelo’s “Moses” augments the world’s fund of conviction and courage. By changing facts into ideas, the mind gives us science. By changing ideas back to facts, it gives us art. Without science, life would be without bread; without art, it would be without ideals. Science ministers to the body, art to the spirit. Men who go from things to ideas are practical; those who go from ideas back to things are the seers. Practical men conserve, but never venture. Seers throw the light of their genius into the dark beyond, disclosing new worlds for men. They are the leaders, they are in the vanguard of human progress. By the possession of two eyes, the eye of sense and the eye of reason, man is placed into relation with two worlds. The world he sees by the eye of sense is meager, limited, poverty-stricken. There are only a few houses in it, a little clump of trees, a little patch of meadow, a horizon hounded by the curl of his cabin smoke. The world he sees by the eye of reason stretches far down into the twilight of the past, embracing all ages, all stages of progress, all empires and republics, all literature and peoples. Through the eye of sense, he sees a world of hard limitation and fact. Through the eye of reason, a universe of ideas, visions, relations. Through the eye of sense, he sees a candle, with its flickering and passing flame. Through the eye of reason, he sees a kingdom of light, with truth and beauty, and love billowing away to infinity.