You can't have a better tomorrow if you're still thinking about yesterday.

The interplay between topology and symmetry in materials can lead to unexpected and exciting physical phenomena.

回忆是我们唯一不会被驱逐的天堂。

The man with a toothache thinks everyone happy whose teeth are sound. The poverty-stricken man makes the same mistake about the rich.

Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.