To do what you do well, that which you love, which earns your livelihood and benefits others. . .talk about a powerful confluence!
I think we all do what we love to do if for no other reason than that because we are doing it, and if so we will fight to the death to keep doing it; and this can be called love. We of course want to do what we do well, but if done poorly and without benefiting others, oh well. It was all we could do. We think we did our best no matter the outcome, but such thought is often full of self-deception.
As regards combining the former three with being paid, well, that's paradise!