It is kind of hard because he has decided to not tell his clients what's wrong (yet) and I'm gonna see him next in two weeks if nothing else changes. So I pretty much know nothing, though from piecing together that he doesn't think he will die within a day or two and that he didn't seem sick at all, I think the most likely thing is cancer or something similar. He has basically said that he's got serious health problems right now and will be back in two weeks, but on the phone he also sounded more like "I want to be able to work again" than "I know Ill be back to work". He's only 63 so I am trying to tell myself he has some chances, but at the same time it's really hard.