where are the shades between uncritical adoption and transformation ?
For example:
An old pagan traditional wisdom is that trees give strenght, and that holy trees can give the strenght to overcome diseases.
The tradition became to have a piece of cloth or rope, some ritual to bind that piece with your sick body and attach it, hang it in that holy tree, to get better from that binding your body to the life force of that tree.
So there were and for that matter still are trees full of mostly white pieces of cloth.
Now.. not all holy trees were chopped to build chapels upon. There were also chapels build alongside such a tree to sanction such a tradition. The Maria statue nearby that tree.
Maria the addition to an unchanged pagan tradition. More a blend imo than a transformation.
If you read the epistle of Gregory the Great, my feel from it is a very parental, caring attitude, avoiding polarisation and disruption in the minds of the people for the moment of change, of someone wise enough to know that a long harmonious process was better for everyone.
What I basically read is to find pragmatical harmonious solutions for the christianising.
Not that that always happened so. Especially when the Carolingian dynasty was challenged in its empire building with the cross, it became more the bloody sword with a cross in its wake. After the killing of the 80 year Bonifatius around 750 AD in Dokkum, the heartland of the Frisians, it became more close to a genocide in that area.
And as side story on the life force of trees, the story of Penelope testing whether the man coming in her house was indeed Odyssey (after 20 years):
Besides the practical cleverness of Penelope, my feel on the why Odyssey build his house, and especially the most important part of his family home, the matrimonial bed, on a chopped (big) tree, was to root the marriage, the family in the earth and give it the life force of the tree.
Summary: Book 23
Eurycleia goes upstairs to call Penelope, who has slept through the entire fight. Penelope doesn’t believe anything that Eurycleia says, and she remains in disbelief even when she comes downstairs and sees her husband with her own eyes. Telemachus rebukes her for not greeting Odysseus more lovingly after his long absence, but Odysseus has other problems to worry about. He has just killed all of the noble young men of Ithaca—their parents will surely be greatly distressed. He decides that he and his family will need to lay low at their farm for a while. In the meantime, a minstrel strikes up a happy song so that no passers-by will suspect what has taken place in the palace.
Penelope remains wary, afraid that a god is playing a trick on her. She orders Eurycleia to move her bridal bed, and Odysseus suddenly flares up at her that their bed is immovable, explaining how it is built from the trunk of an olive tree around which the house had been constructed. Hearing him recount these details, she knows that this man must be her husband. They get reacquainted and, afterward, Odysseus gives his wife a brief account of his wanderings. He also tells her about the trip that he must make to fulfill the prophecy of Tiresias in Book 11. The next day, he leaves with Telemachus for Laertes’ orchard. He gives Penelope instructions not to leave her room or receive any visitors. Athena cloaks Odysseus and Telemachus in darkness so that no one will see them as they walk through the town.
And as further side note: Greek philosophy, heroes and ancient Greek history does not give much room for women. The usual male warriors, trophy women and intrigues. But Odyssey is pictured differently by Homer.