Socrates taught without fee or reward, and communicated his instructions freely to high and low, rich and poor. His chief method of instruction was derived from the style of Zeno, of the Eleatic school, and consisted of attacking the opinions of his opponents and pulling them to pieces by a series of questions and answers. [Footnote: A fine example of the Socratic mode of disputation may be seen In "Alciphron; or, the Minute Philosopher," by George Berkeley, D.D., Bishop of Cloyne, Ireland. It is a defence of the Christian religion, and an exposé of the weakness of infidelity and skepticism, and is considered one of the most ingenious and excellent performances of the kind in the English tongue.] He made this system "the most powerful instrument of philosophic teaching ever known in the history of the human intellect." The philosopher was an enthusiastic lover of Athens, and he looked upon the whole city as his school. There alone he found instruction and occupation, and through its streets he would wander, standing motionless for hours in deep meditation, or charming all classes and ages by his conversation. Alcibiades declared of him that, "as he talks, the hearts of all who hear leap up, and their tears are poured out." The poet THOMSON, musing over the sages of ancient time, thus describes him: O'er all shone out the great Athenian sage, And father of Philosophy! Tutor of Athens! he, in every street, Dealt priceless treasure; goodness his delight, Wisdom his wealth, and glory his reward. Deep through the human heart, with playful art, His simple question stole, as into truth And serious deeds he led the laughing race; Taught moral life; and what he taught he was.