我不是因为快乐而唱歌；我因为唱歌而快乐。
I don't sing because I'm happy; I'm happy because I sing.
The beauty of physics lies in its ability to explain the universe with a few simple principles.
The historian will tell you what happened. The novelist will tell you what it felt like.
Without food, man can live at most but a few weeks; without it, all other components of social justice are meaningless.
True innovation often comes from listening to those on the factory floor.