REPOSTED FROM "15 Things Happy People Do Differently":

5. MEANING vs. AMBITION.  They do the things they do because of the meaning it brings into their lives and because they get a sense of purpose by doing so. They understand that “Doing what you love is the cornerstone of having abundance in your life” like Wayne Dyer puts it, and they care more about living a life full of meaning rather than, what in our modern society we would call, living a successful life.

The irony here is that most of the time they get both, success and meaning, just because they choose to focus on doing the things they love the most and they always pursue their heart desires. They are not motivated by money; they want to make a difference in the lives of those around them and in the world.