"To find out what one is fitted to do, and to secure an opportunity to do it, is the key to happiness." -- John Dewey
"To business that we love, we rise betime
and go to't with delight"-- William Shakespeare, Anthony and Cleopatra, Act IV, scene IV
And to do endlessly what one is not fitted to do is right next door to Hell, I would imagine. Or perhaps, I remember. But for those readers who are trapped in jobs they are not suited for: remember that your job is not all that you do... yes, remember this while you plan your escape!