The difference to me is not between the believers on one hand and the nonbelievers on the other hand. It's between people who carry in their hearts some sense of what the word "God," at least to me, means, which is a loving, creating, everlastingly renewing presence deeply concerned with the well-being of the earth and all its creatures.
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 BuechnerGod knows we have our own demons to be cast out, our own uncleanness to be cleansed. Neurotic anxiety happens to be my own particular demon, a floating sense of doom that has ruined many of what could have been, should have been, the happiest days of my life, and more than a few times in my life I have been raised from such ruins, which is another way of saying that more than a few times in my life I have been raised from death - death of the spirit anyway, death of the heart - by the healing power that Jesus calls us both to heal with and to be healed by.
Frederick Buechner