The otherworldly must behave as prescribed by their stage until the force becomes part of them. While the potion is not yet digested, the bearer is vulnerable: the force is already there, but there is no authority over it yet.
The roles of the pastoral paths: The Listener hears what others do not speak of, the Shepherd is responsible for those who followed them.
The method remained known to few for a long time: church hierarchs were in no hurry to reveal it, and many otherworldly rose blindly, paying for it with their sanity.