Cheerfulness is the best promoter of health and is as friendly to the mind as to the body.

我相信一切事情的发生都有其原因。

Train people well enough so they can leave, treat them well enough so they don't want to.

成功没有捷径，只有脚踏实地。

"You have to believe in yourself when no one else does—that makes you a winner right there."

习惯的强度是其被强化次数的函数。