不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。

侦查的艺术不在于看到可见之物，而在于察觉无形之物。

We must resist the temptation to make African art merely illustrative of theory.

领导力是行动，而非职位。

The environment shapes behavior, but behavior also shapes the environment.