The function of mental processes is to mediate between the needs of the organism and the demands of the environment.
Making something variable is easy. Controlling duration of constancy is the trick.
如果你想飞翔,就必须放弃拖累你的东西。
Be yourself; everyone else is already taken.
"Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful."
"The soul is not a thing, it is a quality or aspect of a thing, and it is the quality of a thing that is most precious."