Augustine of Hippo

See what a fight we have with our dead sins, as that active soldier of Christ and faithful teacher of the church shows. For how is sin dead when it works many things in us while we struggle against it? What are these many things except foolish and harmful desires which plunge those who consent to them into death and destruction? And to bear them patiently and not give into them is a struggle, a conflict, a battle. And between what parties is this battle if not between good and evil, not of nature against nature but of nature against fault, which is already dead but still to be buried, that is, entirely healed?