The most profound ideas in mathematics often arise from the simplest observations.

A shortage is a sign that somebody is keeping the price artificially lower than it would be if supply and demand were allowed to operate freely.

对自然界的理解及其内涵不仅是巨大好奇心的来源，也是巨大成就感的来源。

你承受的痛苦越多，就越能享受成功的喜悦。