如果你用行为主义的方式养育孩子，让他们无所畏惧，世界就会改变。

The only constant is change, continuing change, inevitable change, that is the dominant factor in society today.

"In the depth of winter, I finally learned that within me there lay an invincible summer."

【释义】明智的君主反思自己的短处，从而不断完善自己；昏庸的君主掩饰自己的短处，永远处于愚昧无知的状态。