运营良好的采石场是精确、安全和尊重的交响乐。

In the end, the value of a theory is not in its complexity, but in its ability to explain and predict.

我并不完美，但我每天都在努力专注于变得更好。

解释：善念不可轻易丧失，恶念不能肆意滋长。

2001：贝索斯致股东信《我们始终坚持现金流为王》

This is a group with many gifts. I'm sure one of your gifts is the gift of a smart and capable brain. I'm confident that's the case because admission is competitive and if there weren't some signs that you're clever， the dean of admission wouldn't have let you in.