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It is a melancholy experience for a professional mathematician to find himself writing about mathematics.The function of a mathematician is to do something, to prove new theorems, to add to mathematics,and not to talk about what he or other mathematicians have done. Statesmen despise publicists, painters despise art-critics, and physiologists, physicists, or mathemticians have usually similar feelings; there is no scorn more profound, or on the whole more justifiable, than that of the men who make for the men who explain. Exposition, criticism, appreciation, is wort for second- rate minds.

A Mathematician's Apology

G.H.Hardy

which cannot be touched without emotion.

Even with the utterly lost,

to whom life and death are equally jests,

there are matters of which no jest can be made.

Edgar Allan Poe