Conversation so far:
What were some of Euronymous' beliefs?
However, Lords of Chaos claims that many who knew Euronymous say "the extreme Satanic image he projected.
Was the extreme Satanic image all an act?
in fact, just that - a projection which bore little resemblance to his real personality".
What was Euronymous really like behind the image?
Mayhem drummer Kjetil Manheim (who was friends with Euronymous from 1983 until his death) described Euronymous as "blond, health oriented, very good at school.
What was Euronymous' personality like?
A nice guy, a family guy ...
But when we weren't around he could play out his role".
How else did people describe Euronymous?
Manheim claimed that Euronymous became "extreme" towards the end of his life.
How was Euronymous extreme towards the end of his life?
He liked telling people that they were worthless; [that] he was the best.
He was all 'I define black metal.
Black metal is me.
How did Euronymous define Black metal?
CANNOTANSWER.

Question: What else is interesting regarding Euronymous' beliefs?
Self-contained rewrite: Besides saying, "Black metal is me.", what else is interesting regarding Euronymous' beliefs?