The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
"You can't always be happy, but you can always be brave."
唯一的限制是你为自己设定的限制。
"Parental investment is the key to understanding the origins of sex differences."
"The power of a story is in its ability to connect us."