设计应该解决问题，而不仅仅是看起来好看。
仅仅拥有一个优秀的头脑是不够的，关键在于如何善用它。
I don't like favors; they oppress and make me fell like a slave. I'd rather do everything for myself, and be perfectly independent.
In our reasonings concerning matter of fact， there are all imaginable degrees of assurance， from the highest certainty to the lowest species of moral evidence.
Do not feel absolutely certain of anything.