历史学家是向后看的先知。

音乐是人类通用的语言。

休士顿，鹰号已着陆于静海基地了。

数学不是一项观赏性运动。

I like to be a free spirit. Some don't like that, but that's the way I am.

Some people don’t like change， but you need to embrace change if the alternative is disaster.