The world is changed by your example, not by your opinion.

In times of change, the ability to adapt and remain agile is what separates the winners from the losers.

We don't need perfect knowledge to take sensible actions.

A book is a version of the world. If you do not like it, ignore it; or offer your own version in return.

你无法回到过去改变开始，但你可以从现在开始改变结局。