"In observational studies, we often have to rely on assumptions that are not directly testable."

城市是一个记忆的迷宫，每一条街道，每一栋建筑，每一个角落都藏着一个等待被发现的故事。

The best way to measure your investing success is not by whether you're beating the market but by whether you've put in place a financial plan and a behavioral discipline that are likely to get you where you want to go.

Sometimes you don't need a goal in life, you don't need to know the big picture. You just need to know what you're going to do next!

没有行动的愿景只是梦想。