最好的数学不仅仅是逻辑的——它是直观且美丽的。

Excellence is not an act, but a habit.

The quality of a country's institutions is the single most important determinant of its long-term economic performance.

Drawing makes you see things clearer, and clearer and clearer.

获得好想法的方法是获得很多想法，然后扔掉不好的。