Good, he did not have enough imagination to become a mathematician. — David Hilbert

"But he (Galileo) was not an idiot,... Only an idiot could believe that scientific truth needs martyrdom — that may be necessary in religion, but scientific results prove themselves in time."

"Mathematics knows no races or geographic boundaries; for mathematics, the cultural world is one country."

"To new concepts correspond, necessarily, new signs. These we choose in such a way that they remind us of the phenomena which were the occasion for the formation of the new concepts."

"Every kind of science, if it has only reached a certain degree of maturity, automatically becomes a part of mathematics."

"If one were to bring ten of the wisest men in the world together and ask them what was the most stupid thing in existence, they would not be able to discover anything so stupid as astrology."

"One can measure the importance of a scientific work by the number of earlier publications rendered superfluous by it."