If you want real peace in the world， start with children.

All violence consists in some people forcing others, under threat of suffering or death, to do what they do not want to do.

在某种程度上，我们都是自己时代的囚徒。

We live in a world where the past is always present, and the present is always haunted by the past.

The best time to plant a tree was 20 years ago; the second-best time is now.

研究的真正乐趣来自于突破我们认为可能的界限。

过去是学习的重要来源，但也是错误的重要来源。