The mind will ever be unstable that has only prejudices to rest on.

The best investment you can make is in yourself.

"Human nature is not infinitely malleable; it comes with an inherent structure that channels development in certain directions."

译文：经常在外人面前夸耀自己就是最大的短处，知道自己还有短处就是最大的长处。赏析：做人低调不张扬，才不会引起别人的嫉妒和报复。为人处世，不谈论自己的优点，不议论别人的短处。

释义：每个人应该先处理好自己的事情，不要去过多干涉别人的事情。