时间是我们唯一真正的敌人，也是我们永远无法击败的敌人。

Learning consists in the modification of certain mediating processes which operate between the stimulus and the response.

The poor don’t fail to save because they don’t want to—they can’t.

In a world of fugitives, the person taking the opposite direction will appear to be running away.

当你来自一个饱受战争摧残的国家时，你对生活会有不同的看法。