世界的整个问题在于愚蠢的人和狂热分子总是对自己如此确定，而聪明的人则充满疑虑。

Mathematical intuition often guides the development of algorithms, but it is the rigorous proof that ensures their correctness and efficiency.

If you don't make mistakes, you're not trying hard enough.

可以教每个人雕刻：必须学会不要米开朗基罗。优秀的程序员也是如此。