Another insightful podcast which I can relate to as my pa-in-law, although in the Navy, had a great interest in the night sky as somewhere among my paperwork I have a certificate from many years ago which was presented to him from the Astrological / Astronomical Society of which he'd been a keen member of.
I have his wonderful German made heavy binoculars that he used during the war on his ships.
Psychologically, having the background/ life that Jeremy had has stood him in good stead for all the years he's tolerated being locked up. His education and intelligence have kept him and his brain on an even keel, whereas if he hadn't been the type of person he is he'd have crumbled a long time ago. His interest in wanting to learn new things, such as Braille has been an asset as well as being able to teach those who weren't as fortunate in having the education that he had has been another way of passing the time. Also his mind has been clear to enable him to do these things !!
I'm sure that when he is released, and after a huge culture shock, it won't take him long to get back into his stride because of his ultra patient persona. Well done to him, he'll be alright.