Angry people are not always wise.
A mathematician's work is mostly a solitary pursuit, but it builds on the work of many others.
"Memory is a tricky thing - it can be both a prison and a liberation."
解釋：不通過學習而能自己知道的，不去請教他人而能自己通曉的，從古到今沒有這樣的事。
I am always glad to think that my education was, for the most part, informal, and had its roots in the soil.