Doing what you love

"Actually, there is only one way in this world to achieve true happiness, and that is to express yourself with all your skill and enthusiasm in a career that appeals to you more than any other. In such a career, you feel a sense of purpose, a sense of achievement. You feel you are making a contribution. It is not work.
[…]
To my mind, the world would be a much pleasanter and more civilized place to live in, if everyone resolved to pursue whatever is closest to his heart’s desire. We would be more creative and our productivity would be vastly increased.

Altogether too much emphasis, I think, is being placed on what we ought to do, rather than what we want to do."

William J. Reilly