When I read this, the first thing I thought of is, "Well that's your problem."
To me, based on my experiences and what I've read and observed from other people, many people find the most happiness from focusing less on oneself, and focusing more on others.
What can I do to enhance the life of someone else? What can I do to make a positive impact on others? What can I do to make a difference on the well being of society?
But instead, it seems like the thought of the quoted sentence is focusing more on benefiting oneself -- make me smarter, make me more successful, make me happier.
Don't get me wrong, I'm talking to myself as well, because I often find myself too focused on me. But I feel that when I instead start to focus on having a positive impact on someone else, that's when I start to experience genuine happiness. That's what I feel makes me a better person.