Stanislaw Ulam Quote
The mathematicians know a great deal about very little and the physicists very little about a great deal.
On the Ergodic Behavior of Dynamical Systems (LA-2055, May 10, 1955) in Stanisław Marcin Ulam (1990). Analogies between Analogies, The Mathematical Reports of S.M. Ulam and His Los Alamos Collaborators. University of California Press.