如果你做了一次，人们会称之为意外。如果你做了两次，他们会称之为巧合。但如果你做了三次，你就证明了一个自然法则。

The past is always constructed from the present.

Mental processes are nature's way of solving life's problems.

The best feeling is when you know you've done everything right and the car is just perfect.

解决数学问题的喜悦是无与伦比的；这是纯粹的智力胜利的时刻。