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[Ankh]

I do believe too that this material is one of the most pure and undistorted sources available on Earth. And to answer your question, just *because of it being just that* it contains *that particular light or energy* which, when it enters the seeker and awakening within it that inner same light, needs to be balanced. So, if there is in the seeker any distortions which are in the direct opposition compared to the teach/learning of the LOO, then these need to be balanced before any progression can be made. 
I have not felt any negative energies when studying this material personally, except those which had to do with personal blockages or distortions. 

Very interesting concept, you're saying the light it contains acts as a pointer for our own distortions and is like a mirror. This is something i'm trying to understand more deeply.

Yes, that is what I am saying. I've seen some people who are positively oriented in the beginning and are happy with finding Ra material, but then, as time goes by and they try to absorb that light/energy within, it doesn't work out well for them. And after a while they blame the Ra material for things that go wrong and think, on contrary to what they thought in the beginning that this material was "good", that it now is "bad" or negatively oriented instead. But I don't think that it's anything wrong with that. It's just that they were not ready for the intensity of the light. You know a saying that goes like: the closer you stand to the light the darker are the shadows. The negative aspects within the self has to be balanced in a pace that one is comfortable with, or as daddy Ra put it - it is inappropriate to move more quickly than one's feet may walk. This is my theory and not a knowing of course. =)