Well, it’s not just theory. It has been key to my personal experience. For many years, the implied model spiritual formation offered to me (and that I offered) was that “more knowledge, more accurate knowledge along more clarity about keeping rules and principles leads to transformation at a deep spiritual level into wisdom.” Unfortunately, my experience and observation is that kind of “dualistic” model focuses on either/or, good/bad performance leads to greater feelings shame, rivalry and avoiding the vulnerability needed for developing spiritual wisdom.
I am very convinced that developing contemplative practices that help us develop a contemplative life are keys to transforming life from being reactive to purposeful and finding the wisdom experience of “peace beyond understanding.”
Here is another voice, Richard Rohr whom I highly respect, sharing his perspective on the importance of developing a contemplative life that brings a “non-dual” point of view that is key to experiencing peace beyond whatever circumstances live brings us.
You will find a link to a podcast with Richard and Krista Tippett on her podcast “On Being” – which I also highly recommend. There is a transcript for those who want to read and ponder his observations.