And this is holy magic, to which the learned must devote themselves more and more, not only to discover new things but also to rediscover many secrets of nature that divine wisdom had revealed to the Hebrews, the Greeks, to other ancient peoples, and even, today, to the infidels (and I cannot tell you all the wonderful things on optics and the science of vision to be read in the books of the infidels!). And Christian knowledge must regain possession of all this learning, taking it from the pagans and infidels tamquam ab iniustis possessoribus, as they had no right to hold it.”
