The difference between an ordeal and an adventure is your attitude.

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

The tragedy of life is not that the beautiful things die young, but that they grow old and mean.

【大意】人的贪欲多了，就会亏损道义；忧虑多了，就会损害智慧；畏惧多了，就会伤害勇气。

能源安全就是国家安全。