6. But let us also see what it is that Jesus promises to his soldiers. He says, “Every place you have set the soles of your feet will be yours.” He had said this to those living at that time concerning the territories of the Canaanites, of the Perizzites, of the Jebusites, and of the rest of the people whose territories they seized as an inheritance after expelling the unworthy inhabitants. But let us consider what is promised to us in these words.

There are certain diabolical races of powerful adversaries against whom we wage a battle and against whom we struggle in this life. However many of these races we set under our feet, however many we conquer in battle, we shall seize their territories, their provinces, and their realms, as Jesus our Lord apportions them to us. For they were once angels; they were glorified in the kingdom of God. Or do we not read that Isaiah says of one of them, “How did Lucifer fall, the one who rose in the morning?” That Lucifer, without a doubt, had a throne in the heavens until he became a fugitive angel. If I should conquer him and set him under my feet, if I should deserve that the Lord Jesus “crush Satan under my feet,” I shall deserve as a consequence to receive the place of Lucifer in heaven.

Thus we understand the promise to us from our Lord Jesus that “every place we set the soles of our feet” will be ours. But let us not imagine that we may be able to enter into this inheritance yawning and drowsy, through ease and negligence. The wrath of his own race possesses the angel [Lucifer]. Unless you vanquish this [wrath] in yourself and cut off all violent impulses of anger and rage, you will not be able to claim as an inheritance the place that angel once had. For you will not expel him from the land of promise by your slothfulness. In like manner, some angels incite pride, jealousy, greed, and lust and instigate these evil things. Unless you gain the mastery over their vices in yourself and exterminate them from your land—which now through the grace of baptism has been sanctified—you will not receive the fullness of the promised inheritance.