Therefore, if we wish God to reign in us, in no way should sin reign in our mortal body; rather we should mortify our members which are upon the earth and bear fruit in the Spirit. There should be in us a kind of spiritual paradise where God may walk and be our sole ruler with his Christ. In us the Lord will sit at the right hand of that spiritual power which we wish to receive. And he will sit there until all his enemies who are within us become his footstool, and every principality, power and virtue in us is cast out.
All this can happen in each one of us, and the last enemy, death, can be destroyed; then Christ will say in us: O death, where is your sting? O hell, where is your victory? And so what is corruptible in us must be clothed with holiness and incorruptibility; and what is mortal must be clothed, now that death has been conquered, in the Father’s immortality. Then God will reign in us, and we shall enjoy even now the blessings of rebirth and resurrection.
From a notebook On Prayer by Origen, priest