It is true that a mathematician who is not also something of a poet will never be a perfect mathematician.
Karl Weierstrass
Round numbers are always false.
Samuel Johnson
Mathematics is not a deductive science - that’s a cliché. When you try to prove a theorem, you don’t just list the hypotheses, and then start to reason. What you do is trial and error, experimentation, guesswork.
Paul R. Halmos
If Java had true garbage collection, most programs would delete themselves upon execution.
Robert Sewell
John Bull can stand many things but can not stand two percent.
Walter Bagehot