The definition of a good mathematical problem is the mathematics it generates rather than the problem itself.
我們都是講故事的人,用記憶的線編織我們生活的織物。
The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.
測量可測量的,并使不可測量的成為可測量的。
一切都是來自于世界的造物主之手的善良;一切都在人手中墮落。