Girolamo Cardano was a 16th-century Pavian polymath who gained most notoriety during his lifetime for his mathematical, medical and astrological knowledge. He traveled Europe to treat a variety of Early Modern bigwigs, he cast horoscopes (his own, seemingly obsessively), taught, wrote copiously and, it seems, pissed a good number of people off.
The Book of My Life is a peculiar collection of Cardano's personal recollections and meditations on his life, given as a set of discrete essays on a variety of topics: descriptions of his appearance; of his habits past and present (he wrote the work while in his 70s); of his family; of his professional and financial troubles; a list of all of his published works and of notable people who mentioned him in their works; and an account of the great grief of his life, the execution for murder of his favorite son.
Cardano's Book is so strange, so highly idiosyncratic; it is simultaneously self-promoting and self-denigrating. He comes across as a little whiny but also disarmingly blunt, and frequently astute. His thoughts and attitudes were odd enough in his own time that one commentator noted that, had Cardano lived any longer, he may have been executed for a heretic. He is easy to find a little ridiculous, but I found it impossible not to like him.
Providing additional interest to me is the fact that he was one of those paradigm straddlers we like not to discuss very often in our modern age, where it is more convenient to pretend there is a clear line between religion and science. Cardano was an early scientist, but he was also a devout Catholic, and an astrologer who saw omens everywhere. Like Newton, like Descartes, like many thinkers claimed as grandfathers to science, Cardano recognized no such distinctions. He wrote mathematical treatises, but also claimed to have a guardian angel. In general, The Book of My Life is a captivating peek inside this worldview, which it is increasingly difficult, I think, for people alive today to seriously contemplate: how can one (educated and reflexive) mind, hold both of these attitudes in one? And yet highly religious minds attuned to a world of signs and significance are what birthed the practice of science. I think they must be related, primordially, in some regard.