"An artist has to train his responses more than other people do. He has to be as disciplined as a mathematician. Discipline is not a restriction but an aid to freedom. It prepares an artist to choose his own limitations."

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In fact, the answer to the question "What is mathematics?" has changed several times during the course of history... It was only in the last twenty years or so that a definition of mathematics emerged on which most mathematicians agree: mathematics is the science of patterns.

— Keith Devlin