在充满仇恨的世界里，爱才是最大的勇气。
The pursuit of mathematical knowledge is a journey that never ends.
To write poetry after Auschwitz is barbaric.
"The truth is rarely pure and never simple."
对性情上了解即是涵养，对每一念头注意提醒就是省察，气质的融汇就是克治。