practical sublation

"Therefore, when by God's help you reach our most reverend brother, Bishop Augustine, we wish you to inform him that we have been giving careful thought to the affairs of the English, and have come to the conclusion that the temples of the idols among that people should on no account be destroyed. The idols are to be destroyed, but the temples themselves are to be aspersed with holy water, altars set up in them, and relics deposited there. For if these temples are well-built, they must be purified from the worship of demons and dedicated to the service of the true God. In this way, we hope that the people, seeing that their temples are not destroyed, may abandon their error and, flocking more readily to their accustomed resorts, may come to know and adore the true God. And since they have a custom of sacrificing many oxen to demons, let some other solemnity be substituted in its place, such as a day of Dedication or the Festivals of the holy martyrs whose relics are enshrined there." (Letter from Pope St Gregory the Great to Abbot Mellitus, A.D. 601, recorded in Bede's Ecclesiastical History of the English People I. 30.)