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The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
"Sometimes the quietest illustrations speak the loudest."
Happiness is like a butterfly; the more you chase it, the more it will elude you. But if you turn your attention to other things, it will come and sit softly on your shoulder.
It is human nature to think wisely and act foolishly.
The deepest problems in mathematics often arise from the simplest questions.