The most important lesson of my life as a quant is that models are not reality.
我作为量化分析师生涯中最重要的教训是：模型并非现实。
The division of labour， so far as it can be introduced， occasions， in every art， a proportionable increase of the productive powers of labour.
我们都在寻找某样东西，但我们不知道它是什么。