The combat between God and the Devil...

The combat between God and the Devil for all vocations and orders takes place within every single human being. If God is victor, then that part of external existence which lies within man’s reach is made to serve God. If Satan wins, God’s creation is used in the opposite way. But an office is good, even when it is misused, even as the spear that pierced Christ’s side did not for that reason cease to be God’s good creation. . . . [T]he Devil’s onslaughts consist of temptations to misuse a good and divine office, to mismanage one’s vocation. . . . Temptation in vocation is the Devil’s attempt to get man out of his vocation.