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.

The quality of the product is the dignity of the enterprise.

The novel is the great lie that reveals the great truths.

在原子世界中，数学语言是唯一可以使用的语言。

最高的真理不需要称扬，最善辩的不需要言说，最仁爱的不需要显摆，最廉洁的不需要谦让，最勇敢的不会造成伤害。