The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

You have to write the book that wants to be written. And if the book will be too difficult for grown-ups, then you write it for children.

解释：合理饮食则身体强健，“昌”表示兴盛；断绝饮食则生命消亡，强调了饮食对健康的重要性。

"Experience is simply the name we give our mistakes."

世界不是由那些正确的人运行的。它是由那些能说服别人他们正确的人运行的。

记忆是脆弱的，生命的空间如此短暂，转瞬即逝，我们永远无法看清事件之间的联系。