>>613638
I'm not 100% on what it means to be prepared for asceticism but I can give you examples of prelest.
Essentially, prelest is when you are tricked into believing you are in a state of grace.
It is most important for Monks and the like but effects all of us.
Orthodox Wiki has some info on it (https://orthodoxwiki.org/Prelest) but I'll give you some examples.
Fr. Seraphim Rose, while writing about UFOs, noted a story of a young monk who was given a shining cloak by an "angel," but when the brothers tried to show it to a nearby saint, the cloak vanished as it was merely a demonic illusion.
Saint Simeon was offered a chariot, similar to that which tool Elisa into heaven, but he unintentionally dispelled the illusion by doing the sign of the cross.
One saint who's name I forget at the moment was new to Ascetic life, he also was not properly prepared for it.
An image of "Christ" appeared to him and offered him an "angel" to pray for him while he read books.
Everybody was amazed by his knowledge of books.
The illusion was dispelled when someone noticed he had a strange aversion to the New Testament and was able to quote the Old Testament by heart despite not reading it fully.