The value or worth of a man is, as of all other things, his price; that is to say, so much as would be given for the use of his power.

牛、猪、战争和巫术并非任意的文化偏好，而是对物质条件的适应。

The art of progress is to preserve order amid change and to preserve change amid order.

传记的挑战不在于发现事实 - 而在于发现事实背后的意义。