事情过后议论别人，身在局外议论局内人，是做学问的人最容易犯的毛病。在事后议论别人，往往将聪明人说得极其愚笨；身在局外议论局内的人，往往将困难的事情说得极其容易，这两种毛病都是由待人不忠诚、不宽容而引起的。

对称性是降低复杂性的概念（协同例程包括子例程）；到处寻找它。

The past beats inside me like a second heart.

译文：女人，通常是服从的。然而上古时期的女人，也有凭借权力行事的，大概是女子并不比男子逊色。

Entanglement is not just a curious feature of quantum mechanics - it is the essential feature.

"The only true voyage of discovery, the only fountain of Eternal Youth, would be not to visit strange lands but to possess other eyes, to behold the universe through the eyes of another, of a hundred others, to behold the hundred universes that each of them beholds."

The world is full of stories, but what matters is how you tell yours.