"The past is always present, whispering in our ears, shaping our steps."

继续前进，继续相信，永不放弃。

2014年：贝索斯致股东信《投资那些具有无限上升空间的创意》

Necessity knows no law.

做得越多，学得越多；学得越多，能做的就越多。

Innovation is not an option; it's a necessity for the survival of the coal industry.