人的精神比单纯的体力更重要，人中的精神火花可以被扇成火焰。

Success in life means doing that which is the very best for us, under the conditions in which we are placed.

我们与大地合作，而不是对抗它。

Logic is the foundation of all mathematical reasoning.

真相很少是纯粹的，也绝不简单。