I was rather puzzled by this card when I opened my mailbox and had to actually ask David if he was sick and dying :-))
I was relieved to hear that all was well for him. After reading his message I thought that he had indeed sent it to the right person. Some people think about death much more often than others do. About the constant threat that is lying upon their head. Is this an early symptom? When is it going to happen, how, how awful etc... I certainly think about that a lot. And about the constant miracle that this infinitely complex machinery is still working today. So, this card did really strike a chord with me, thank you David (but pfiuuu, you got me there, and for more than one second!).