The only limit is the one you set for yourself.

如果我是艺术家并且我在工作室里，那么我在工作室里做的任何事情都必须是艺术。

Challenges are opportunities in disguise—if you're willing to look closely.

The inflationary universe model suggests that the universe expanded exponentially in the first fraction of a second after the Big Bang.

心灵是自己的地方，它本身可以把地狱变成天堂，把天堂变成地狱。