I do not recall one every resigning in my lifetime. It just isn’t usually done. I am leaning towards a progressive disease that robs him of his mental facilities like Alzheimers. (vs a disease that he would die from within a shorter period of time like cancer).
First Pope to resign the office in 600 years, from what I’ve read.
That’s the first one in anyone’s lifetime. Unless you’re of the MacLeod clan.
Has there ever been a Papal abdication that was voluntary?
I hope not, last one was in 1415.