Like most people, I worry about the end of the universe. OK, most people don't. But I read lots of popular science, and I know we're in for a cold, lonely universe eventually, as it all spreads out. When I was a kid, it was the heat death of the universe we had to worry about.
A neighbor's boy is in the ICU. (Please keep his family in your thoughts). The doctors and nurses in the ICU don't worry about the ultimate fate of their patients; like all the rest of us, they will die one day. But the doctors and nurses work all the time to heal them right now. That's what we are all called to do.
(This is a paraphrase of a message I shared at Meeting a few weeks ago).