Flannery O'Connor asked that question in the author's note to the 2nd edition of Wise Blood. Then she answered herself:
I think that usually it does, for free will does not mean one will, but many wills conflicting in one man. Freedom cannot be conceived simply. It is a mystery and one which a novel, even a comic novel, can only be asked to deepen.I kind of hate it when good writers can just take four concise sentences and cut to the core of ideas I've spent a lifetime chipping around the edges of. The plurality of will, the complexity of freedom, and most importantly to me, the deadly serious task of living comedy.
Fuck you O'Connor. Fuck you to HELL.