Good mathematicians see analogies between theorems or theories. The very best ones see analogies between analogies.

Stefan Banach, in S. M. Ulam, *Analogies between Analogies: The Mathematical
Reports of S. M. Ulam and His Los Alamos Collaborators*

Good mathematicians see analogies between theorems or theories. The very best ones see analogies between analogies.

Stefan Banach, in S. M. Ulam, *Analogies between Analogies: The Mathematical
Reports of S. M. Ulam and His Los Alamos Collaborators*