Thelema, Crowley, Higher Guardian Angel

Does anyone know much about Thelemic practices, Aleister Crowley’s teachings, and the Higher Guardian Angel?
In this book by Alan Chapman is this quote:
https://thebaptistshead.files.wordpress.com/2013/03/threestepsebook.pdf

That certainly sounds quite appealing, does it not? And yet, Crowley was an ego centric man. Can this “HGA” be bad for your soul? Can it be a demon in disguise? In order to evoke the HGA requires complete surrender to him… that puts me off a bit.
The claim of what the HGA is, is that he’s your guardian angel that’s been with your during your entire life. He is your true self. If that’s the case, then there’s nothing to fear, is there?

seems kinda lazy

My guru has become my angel; maybe they are twins or something…

There is nothing to fear…
Angel
Guru
God
Self
You
All…or nothing
You are All
You are nothing
No-Thing
nothing
but
:heart:

If anyone would like to correspond with me regarding this topic, I would be very grateful.

:pray:
I’ve just listened a radio interview of a Finnish Marko Meretvuori(has social media), who has studied and practised Crowley’s method for 15 years. When he was asked is HGA the Higher I, True Will, or what, he said that HGA is something that everyone has to find out them self, that it is something that can’t be put in to words/consepts, and that is why also Crowleys explanations about it changed over time.