An Other must behave as their level dictates until the power becomes part of them. Until the potion is digested, the bearer is vulnerable: the power is already there, but they have no control over it yet.
The path roles are functional: the Archaeologist makes sense of what is found, the Craftsman works with their hands, the Alchemist transforms one thing into another and is responsible for the result.
The method remained the knowledge of the few for a long time: the church hierarchies were in no hurry to reveal it, and many Others ascended blindly, paying for it with their sanity.