道气常在天地内外运行流转，之所以看不见，是因为它极其清微。

The study of computational complexity is not just about solving problems, but also about understanding the limits of what can be computed.

Think wrongly, if you please, but in all cases, think for yourself.

I don’t believe in styles, I believe in coherence.

We live in a world of shadows, and what we call reality is only the shadow of a shadow.