For original authorities in reference to the matter of this chapter, read Diogenes Laertius's Lives of the Philosophers; the Writings of Plato and Aristotle; Cicero, De Natura Deorum, De Oratore, De Officiis, De Divinatione, De Finibus, Tusculanae Disputationes; Xenophon, Memorabilia; Boethius, De Consolatione Philosophiae; Lucretius. The great modern authorities are the Germans, and these are very numerous. Among the most famous writers on the history of philosophy are Brucker, Hegel, Brandis, I.G. Buhle, Tennemann, Hitter, Plessing, Schwegler, Hermann, Meiners, Stallbaum, and Spiegel. The History of Ritter is well translated, and is always learned and suggestive. Tennemann, translated by Morell, is a good manual, brief but clear. In connection with the writings of the Germans, the great work of the French Cousin should be consulted. The English historians of ancient philosophy are not so numerous as the Germans. The work of Enfield is based on Brucker, or is rather an abridgment. Archer Butler's Lectures are suggestive and able, but discursive and vague. Grote has written learnedly on Socrates and the other great lights. Lewes's Biographical History of Philosophy has the merit of clearness, and is very interesting, but rather superficial. See also Thomas Stanley's History of Philosophy, and the articles in Smith's Dictionary on the leading ancient philosophers. J. W. Donaldson's continuation of K. O. Müller's History of the Literature of Ancient Greece is learned, and should be consulted with Thompson's Notes on Archer Butler. Schleiermacher, on Socrates, translated by Bishop Thirlwall, is well worth attention. There are also fine articles in the Encyclopaedias Britannica and Metropolitana. SOCRATES. 470-399 B.C. GREEK PHILOSOPHY. To Socrates the world owes a new method in philosophy and a great example in morals; and it would be difficult to settle whether his influence has been greater as a sage or as a moralist. In either light he is one of the august names of history. He has been venerated for more than two thousand years as a teacher of wisdom, and as a martyr for the truths he taught. He did not commit his precious thoughts to writing; that work was done by his disciples, even as his exalted worth has been published by them, especially by Plato and Xenophon. And if the Greek philosophy did not culminate in him, yet he laid down those principles by which only it could be advanced. As a system-maker, both Plato and Aristotle were greater than he; yet for original genius he was probably their superior, and in important respects he was their master. As a good man, battling with infirmities and temptations and coming off triumphantly, the ancient world has furnished no prouder example.