The study of black holes has revolutionized our understanding of space and time.

如果我不演戏，我不知道我会做什么。我想我会发疯的。

学习不仅仅是记忆的问题；它是创造的问题。

Policy should be based on evidence, not ideology.

There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.