physics. Logic is the study of ideal method in thought and research: observation and introspection, deduction and induction, hypothesis and experiment, analysis and synthesis—such are the forms of human activity which logic tries to understand and guide; it is a dull study for most of us, and yet the great events in the history of thought are the improvements men have made in their methods of thinking and research. Esthetics is the study of ideal form, or beauty; it is the philosophy of art. Ethics is the study of ideal conduct; the highest knowledge, said Socrates, is the knowledge of good and evil, the knowledge of the wisdom of life. Politics is the study of ideal social organization (it is not, as one might suppose, the art and science of capturing and keeping office); monarchy, aristocracy, democracy, socialism, anarchism, feminism—these are the dramatis personae of political philosophy. And lastly, metaphysics (which gets into so much trouble because it is not, like the other forms of philosophy, an attempt to coördinate the real in the light of the ideal) is the study of the "ultimate reality" of all things: of the real and final nature of "matter" (ontology), of "mind" (philosophical psychology), and of the interrelation of "mind" and "matter" in the processes of perception and knowledge (epistemology).
These are the parts of philosophy; but so dismembered it loses its beauty and its joy. We shall seek it not in its shrivelled abstractness and formality, but clothed in the living form of genius; we shall study not merely philosophies, but philosophers; we shall spend our time with the saints and martyrs of thought, letting their radiant spirit play about us until perhaps we too, in some measure, shall partake of what Leonardo called "the noblest pleasure, the joy of understanding." Each of these philosophers has some lesson for us, if we approach him properly. "Do you know," asks Emerson, "the secret of the true scholar? In every man there is something wherein I may learn of him; and in that I am his pupil." Well, surely we may take this attitude to the master minds of history without hurt to our pride! And we may flatter our-
