Flannery O'Connor
“Where you come from is gone, where you thought you were going to was never there, and where you are is no good unless you can get away from it. Where is there a place for you to be? No place. Nothing outside you can give you any place. In yourself right now is all the place you've got.” 
– Flannery O’Connor
Howard Thurman
"There is something in every one of you that waits and listens for the sound of the genuine in yourself. It is the only true guide you will ever have. And if you cannot hear it, you will all of your life spend your days on the ends of strings that somebody else pulls." 
– Howard Thurman
Frederick Beuchner-
“The place God calls you to is the place where your deep gladness and the world’s deep hunger meet. By and large, a good rule for finding out is this: the kind of work God usually calls you to is the kind of work that (a) you need most to do and (b) that the world 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 deodorant commercials, the chances are you’ve missed requirement (b). On the other hand, if your work is being a doctor in a leper colony, you have probably met requirement (b), but if most of the time you’re bored and depressed by it, the chances are you have not only bypassed (a) but probably aren’t helping your patients much either.”
– Frederick Beuchner