What fallen man lacks is the moral disposition, the desire, or the inclination for righteousness. Stated simply, man still has the ability to choose what he wants, but lacks the desire for true righteousness. He is naturally free, but he is morally enslaved to his own corrupt and wicked desires. Both Edwards and Augustine said man is still free to choose, but if left to himself, man will never choose righteousness, precisely because he does not desire it.
