网球给了我一切，我想回馈一些东西。

A good abstraction is one that captures the essential aspects of a concept while ignoring the irrelevant details.

Don’t wait for opportunities—create them.

积极强化的实施方式比强化的数量更重要。

领导力是激励他人看到自己内在的潜力。

Our capacity to draw happiness from aesthetic objects or material goods in fact seems critically dependent on our first satisfying a more important range of emotional or psychological needs, among them the need for understanding, for love, expression and respect.