I'm not going to lie to you, you'll need some background in critical thinking in order to make any sense of this book. In other words, you'll need to forget everything you know and be open to the possibility that what you previously knew isn't necessarily true.
To me, The Cosmic Doctrine is a presentation of Universal Laws, all wrapped up in poetic language.
For more explanation on this, I have 2 ebooks available, Imploded by Kal Brooke and Into The Light by Ed O'Neill (a sort of autobiography).
If you rather poetic language, buy this, but if you rather straight forward info with no frills, you can look elsewhere.
As I've been saying for years, just because someone slaps a nice label on something, doesn't make it different other than on a superficial level.