Fear is the main source of superstition， and one of the main sources of cruelty. To conquer fear is the beginning of wisdom， in the pursuit of truth as in the endeavour after a worthy manner of life.

The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'

做东西的时候，总要多备上一些——额外的材料、额外的部件、额外的空间、额外的饰面。这些额外的东西可以为错误提供备份、减轻压力，还可以为未来储备资源。它们是最便宜的保险。

Quality is not a assurance; it is a proof.

2002年：贝索斯致股东信《同时提供领先世界的用户体验，和价格最低的产品》

No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.