Some famous quotes often give interesting insights into the vision of mathematics that certain mathematicians have. Which ones are you particularly fond of?
Standard community wiki rules apply: one quote per post.
Some famous quotes often give interesting insights into the vision of mathematics that certain mathematicians have. Which ones are you particularly fond of? Standard community wiki rules apply: one quote per post. 

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Who can does; who cannot do, teaches; who cannot teach, teaches teachers. Paul Erdos. 


Mathematicians are born, not made.  Henri Poincare 


"There are, therefore, no longer some problems solved and others unsolved, there are only problems more or less solved, according as this is accomplished by a series of more or less rapid convergence or regulated by a more or less harmonious law. Nevertheless an imperfect solution may happen to lead us towards a better one." Henri Poincare 


"Mathematics consists of proving the most obvious thing in the least obvious way."  George Polya 

