The biggest risk is not taking any risk. In a world that's changing really quickly, the only strategy that is guaranteed to fail is not taking risks.

Investors should avoid trying to time the market; it's a losing game.

一个人为了保护自己的身体而做的事情，被视为合法行为。

解析：强调人心就是天理，无需外求。

别让别人的意见淹没了你内心的声音。

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