For the longest time I foud it difficult to explain the concept of usefulness and happiness. But when I recently ran into a quote by Ralph Waldo Emerson, the dots connected.

Emerson says:

"The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well."

And I didn't get that before I became more conscious of what I'm doing with my life. And that always sounds heavy and all. But it's actually really simple.