Cusanus‘s On Learned Ignorance is one of the most fascinating things I’ve read in a long time. Particular points of interest:
- Book I features a demonstration that an infinite line is also equal to an infinite triangle, circle, and sphere. I’m convinced.
- Book II outlines a cosmology that is, in its basic principles, identical to Kepler’s — the universe doesn’t have a center, and there are no perfect circles in nature. He derives this stance from theological principles. My jaw may literally have dropped.
I found the introduction in the “Classics of Western Spirituality” edition to be characteristically helpful, and the other shorter pieces they package with it are a good warm-up for On Learned Ignorance.