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 past is never dead. It's not even past."

If we want to feed the world, we must first learn to listen to it.

教育就是激发生命,充实生命,协助孩子们用自己的力量生存下去,并帮助他们发展这种精神。”。

"The best time to plant a tree was 20 years ago. The second best time is now."

只有冒险的人才会自省。