"The Luminous Ground" is an odd book, as odd as its title. This book is the reductio ad absurdum of what happens when you are a smart, caring person and take "experience" to have some kind of fundamental reality, but don't consider the organization of processes to have the same fundamental reality as physical fields of matter and energy. One therefore has to uncover, or perhaps invent, a background physical field of "experience" or universal consciousness that relationships tap into.
For myself, I think this is almost exactly backwards: I don't think our experience has to derive its meaning from explanation that extend physical mechanism. Instead, we experience mechanical correspondences between physical phenomena and give them stable meaning by noticing their shared explanatory and predictive power in how these relationships affect our experience.
There are other correspondences between our experiences besides the most crude mechanical ones. Some given remarkably little attention in this work are the complex processes of being biologically alive, being part of that continuously ongoing metabolic and genetic sequence of cycles and feedback, even though these processes obviously corresponds to the capacities treasured here, of building and experiencing what one has built.
For Alexander, it's either psychological and personal, and thus truly unshared, or grounded directly in physics, and not really having anything to do with biological life. For me, building and living in the built world is part of the broader story of organisms in relationship to their habitat.
I wonder if part of the challenge was trying to think about the processes of experience through architecture, itself often concerned with long stable, if not entirely static, relationships. Or maybe it was looking for something more eternal and less contingent then the strange and convoluted dynamics of being biologically alive.
Fortunately, a mercifully small amount of this book is actually about this kind of thing, and there is some beautiful thought here about color relationships, about how making improves the maker, about making work that pleases oneself, and a variety of other topics. Overall, like the second and third books, it's a pleasurable read, unlike the first book, which truly tried my patience.