AS Socrates lay dying, having drunk of hemlock, he told his faithful disciple Crito, uncovering his face for the last time, "Crito, I owe a cock to Asclepiusbe sure to see that it is paid." The worlds debt to Socrates, in comparison with his to Asclepius, is indeed immeasurable. He taught us to develop the attitude of questioning which bespeaks clear thinking and, to make it easier for us, he introduced the idea of defining the terms of whatever we discuss. Socrates did this without putting anything in writing, exercising an influence greater than that of the printed word, unlike the other great thinker Voltaire whose literary output is reckoned to have been 15 million words. Voltaires contribution was in the main to rid Europe of medieval ideas and institutions. Socrates was more basic, more universalto reach beyond what appears to be to what is. Socrates died a martyr to his beliefs. But the Socratic heritage lives on.