数学中最深刻的思想往往源于最简单的观察。
The most profound ideas in mathematics often arise from the simplest observations.
In time of war, when truth is so precious, it must be attended by a bodyguard of lies.
The best way to predict the future is to study the past.
The past is never dead. It's not even past.
"Love is or it ain't. Thin love ain't love at all."