That's the only trouble with being a dog...they never tell you anything…

The function of thought is to guide action toward successful outcomes.

The essence of mathematics is not to make simple things complicated, but to make complicated things simple.

译文：有田不去耕种，仓库就会空虚，有书不让孩子去读，子孙后代就会愚昧无知。赏析：蜂采百花酿甜蜜，人读群书明真理。不吃饭则饥，不读书则愚。鸟欲高飞先振翅，人求上进先读书。不论我们的生活多么糟糕，都要让我们的孩子多读书。

计算复杂性的美在于它能够揭示问题的固有难度，而不管用于解决这些问题的具体算法是什么。