Mathematics is not just a collection of abstract theories, but a language that describes the universe.
The man who writes about himself and his own time is the only man who writes about all people and about all time.
The past is not a foreign land but our ancestral home.
最好的想法往往来自意想不到的地方——保持开放的心态。
未来不是沉重的,而是轻盈的。
唯一失败的时候就是你停止尝试的时候。
现实一点,要求不可能的事!