“If I knew something about it, I wouldn’t lecture on it!”
[As quoted in: Cassidy, David C. Uncertainty: The Life and Science of Werner Heisenberg (W. H. Freeman and Company, 1992) p. 104.]
Arnold Johannes Wilhelm Sommerfeld FRS was a German theoretical physicist who pioneered developments in atomic and quantum physics, and also educated and groomed a large number of students for the new era of theoretical physics. He was nominated a record 81 times for the Nobel Prize, and served as PhD supervisor for more Nobel prize winners in physics than any other supervisor before or since.