From reading his books, it seems to me that he saw things basically as a series of processes. Once one process was finished, I.E. visualizing, then the next one started. By working in a series of processes, large tasks become smaller and less confusing.
By breaking down the processes into a more fundamental set of "knowledges," each step could be learned with decreasing difficulty, as the series built upon previous learning.
His work made photography available to anyone by giving them a good set of tools and knowledge that few were willing to share outside their circles. Read the various sections at your pace, and in the order that works best for you, it's more accessible that way, and you can identify more with the lessons learned.