The essence of strategy is choosing what not to do.

The way we treat ourselves sets the standard for how others will treat us.

Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips and supple knees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life.

物理学家的直觉就像复杂荒野中的指南针。

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。

理解是接受的第一步，只有接受才能痊愈。

历史学家的首要职责是忠于真相。