Mathematics is not a spectator sport. You have to get involved.

"I tend to think that the camera is much more truthful than the human eye."

The leather industry must evolve to meet both environmental standards and consumer expectations without compromising quality.

人类心智的结构更适合更新世而非现代世界。

音乐是灵魂的语言。

儿童心灵上的许多烙印，都是成人无意间烙下的。

人们并不懒惰。他们只是有无力的目标——也就是说，那些不能激励他们的目标。