The causal approach is about understanding the mechanisms that generate the data.

有时候最有力的时刻是那些未说出口的时刻。

The writer must be a free being, even if it costs him everything.

The only way out is through.

当且仅当所有投资者都持有均值-方差有效的投资组合时，市场组合才是有效的。

I believe it's essential to understand the psychology of the market and the psychology of the investor.

Sustainability isn't an option; it's a responsibility we owe to future generations.

So go ahead. Fall down. The world looks different from the ground.

大的不怕与小的同游，居中的却远避之。