I wonder how the mind chooses what it's interested in?
I am fascinated by art and gadgets for example. John A whose photos I've shown, is very interested in the history of Christianity, and very educated and insightful in it. Another friend is a keen collector of stamps.
An interest is probably a way of dealing with a big universe, I'm just wondering what would cause a specific choice. Admittedly this is probably way too metaphysical to have a good answer for us humans.