Satan is the one who chooses a person to become a High priest/ess.
To become a high priest/ess is not easy, and the title is well earned. It takes a LOT of hard work, and not everyone suits it's role. As it takes serious dedication in Satans affairs. Thus, ones mentality and spiritual level has to be advanced, I believe.
And it runs even deeper. Satan chooses the one he sees he can trust on the role as a high priest/ess, that he knows will do his/her job very well.
Do not misunderstand me, there are satanist who are doing a very well job and are serious dedicated in his affairs. Thus, they do not fit the role as a high priest/ess and Satan has most likely another plan for you. That suits you the best.
If a High Priest/ess is something you truly want, then I suggesst you talk too Satan about this. And he will give certain tests you have to accomplish to earn that title.(If it suits you of course) And it can take you years. And remember! It is a LOT of hard work. Are you ready for such commitment? Are you ready to cancel your plans and sit down day by day and read hours of study for him? Are you ready to devote your time whenever he tells you too?
There are many things you have too understand, face and grow too become fully aware of the commitment and their well respected job.
They give us the truth. The truth and not lies.
