Well, if I'm goin into battle, I'll take anything I can carry that I think might possibly be of help. And if I'm drawn to spiritual growth, I'm hoping to increase not decrease what I find of value in that growth.
So, I'm confused by this emphasis on determining the bare"sufficient" when it comes to spirituality and religion. I may not need to make a special place in a corner of my house, make it sacred, for morning prayer, it may be entirely sufficient not to even have that morning prayer, come to think of it, I could eliminate a lot of stuff, it's just not necessary is it? And while we're on the subject, do we really need every word of scripture, couldn't we remove a lot and still have what is sufficient for realizing salvation? What's the use of all that extra unnecessary stuff anyway?
So, pilgrim, I still don't get the point here; it seems like a minimalist effort at increasing our conscious contact with God - and that oxymoronizes me.
I'm not ruling out any place for books and teachers and churches. We can learn a lot from what others have learned and are willing to teach us, and from theology books which have systematized the teachings of scripture. But we do not NEED extra-biblical doctrines, because we are already fully equipped.