I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines. They go to bed every night a little wiser than they were when they got up and boy does that help, particularly when you have a long run ahead of you.

The strength of a response tendency depends on the amount of reinforcement received.

我为孩子们写作，因为我曾经是一个需要书籍的孩子。

我不害怕失败。我不害怕冒险。