The worst isn't the last thing about the world. It's the next to the last thing. The last thing is the best. It's the power from on high that comes down into the world, that wells up from the rock-bottom worst of the world like a hidden spring. Can you believe it? The last, best thing is the laughing deep in the hearts of the saints, sometimes our hearts even. Yes. You are terribly loved and forgiven. Yes. You are healed. All is well.
Frederick BuechnerBy and large a good rule for finding out is this: the kind of work God usually calls you to is the kind of work a) that you need most to do and b) the world most needs to have done. If you really get a kick out of your work, you've presumably met requirement a), but if your work is writing TV deodorant commercials, the chances are you've missed requirement b).
Frederick Buechner