模型只是模型，而非事物本身。因此我们既不能过分依赖它们，也不能完全不依赖。

To write is to resist, to fight against the injustices of the world with the power of words.

Theorems are eternal; their proofs are ephemeral.

I'm a perfectionist, but I've learned to let go.

最好的投资是投给那些能将愿景变为现实的人。