The Importance of Happiness

I think it's the intersection of happy, smart and useful. So what I mean by that is happy is doing what makes you happy. Smart is doing the strategic and smart thing and useful means being useful to others. When people are doing something smart and rational, but they're not happy about it, they're forgetting that happiness is a crucial ingredient. But on the other hand, if you combine happy and smart, but forget about useful, then that's like somebody who's like a self-help addict or those people that are searching for passive income.