I'm so glad you're enjoying the book. I read it so long ago that I don't remember a lot, but I hold on to it tightly. I suppose if I gave it another read now, it would probably make even more sense to me...I was considerably less spirituall cognizant at the time I first read!
Anyway, I still contend I don't know much about Astrology, but everything you said rings true...particularly "you need your relationships to be harmonious and to be able to talk expansively and philosophically about religious/spiritual subjects".
My relationship is not exactly harmonious, but we're working on it. But I thank God everyday that I can talk philosophically and spiritually with hubby. I just couldn't be with someone who just dismisses my interests as "hocus pocus" or some such. He listens deeply to what I say (unless I'm angry or upset).