There are no hard distinctions between what is real and what is unreal, nor between what is true and what is false.
"The truth is rarely pure and never simple."
The best architecture is invisible.
无论多么聪明的人,在他年轻时都曾说过或做过一些事情,后来回想起来会感到不快,以至于如果可能的话,他会很高兴地从记忆中抹去。
学习数学的最好方法就是做数学。
The past is a foreign country; they do things differently there.