仅仅观察、实验、理论化和计算是不够的。人们还必须想象。
It is not enough to observe and experiment, theorize and calculate. One must also imagine.
如果你想在数学上取得进步，你必须习惯于不舒服。
Functions delay binding; data structures induce binding. Moral: Structure data late in the programming process.
一个父亲能为孩子做的最重要的事就是爱他们的母亲。