The only way to learn mathematics is to do mathematics.
The only one who's really judging you is yourself.
We must build dikes of courage to hold back the flood of fear.
教导如何在没有确定性的情况下生活,但又不被犹豫所束缚,或许是哲学在我们这个时代,可以为学习它的人所做的主要事情。
空气中弥漫着一种悲伤,但这种悲伤让你感觉活着。