It's on the strength of observation and reflection that one finds a way. So we must dig and delve unceasingly.

I'm not afraid to fall because I know I'll get back up.

The only difference between a rat and a human is that a rat learns from experience.

The past is always with us, and it's always more complicated than we think.

计算机是我们想出的最了不起的工具。它相当于我们思维的自行车。

国际政治是一个残酷而无情的舞台，各国不断努力最大化自己的权力和安全。