The right of a nation to kill a tyrant in case of necessity can never be doubted until the right of a tyrant to kill a nation has been proved.
数学的美在于它既精确又富有创造性。
Innovation is not from 1 to N, but from 0 to 1.
You can be the ripest, juiciest peach in the world, and there's still going to be somebody who hates peaches.
Life is short, and it's up to you to make it sweet.