解释：德行不够优良的人，难以有崇高的信念与理想。才能不够突出的人，难以有渊博的知识和见解。

Learning is essentially a matter of stimulus-response connections.

A real decision is measured by the fact that you’ve taken a new action. If there’s no action, you haven’t truly decided.

真正的痛苦不是来自外部，而是来自我们如何理解它。