The most important skill in mathematics is the ability to think clearly.
I don't believe in charity. I believe in solidarity.
真正的监狱不是由围墙构成,而是由沉默的舌头和被审查的思想构成。
世界处于不断变化的状态。没有什么是保持不变的。你永远不能两次踏入同一条河流。
I try to leave every place a little better than I found it.