The whole difference between construction and creation is exactly this: that a thing constructed can only be loved after it is constructed; but a thing created is loved before it exists.

The only good is knowledge and the only evil is ignorance.

Do not feel absolutely certain of anything.

感叹蔡泽当年壮志难酬，才去找唐举来解决问题。知道天道微妙难以捉摸，要跟随渔夫同享山水乐。

数学和计算机科学之间的相互作用是深刻而美丽结果的丰富源泉。