交换、交易和互换的倾向普遍存在于所有人之中，而在其他动物种族中找不到。
The propensity to truck， barter， and exchange one thing for another is common to all men， and to be found in no other race of animals.
"Time is not a line but a dimension, like the dimensions of space."
Life is a journey, not a destination.
The night is young, and so am I.
"Mental life is fundamentally adaptive."
The only thing that can make you a winner is your resilience.
The mind is a system for making life possible.
文学的衰落表明一个民族的衰落。这两者走下坡路的时候是齐头并进的。
企业的成功不是靠跟随，而是靠引领。
"A book is a conversation between the author and the reader, across time and space."