By STAFF David Kirkpatrick, Louis S. Richman, Patricia Sellers, H. John Steinbreder, Shawn Tully

(FORTUNE Magazine) – PETER DRUCKER, 77, management guru: ''You have no idea how much I learn teaching. It forces me to listen to myself. All the things I don't realize I have been thinking about until I hear myself saying them.''

PETER COHEN, 41, chairman of Shearson Lehman Brothers, commenting on when Japan's stock market will start to cool: ''I don't think anyone who's not in his fourth reincarnation can figure that one out.''

LESTER THUROW, 49, dean of MIT's Sloan School of Management, telling Japanese businessmen how to cure the U.S. budget deficit: ''Your quitting lending money to us would be the best thing you could do.''