You inadvertently hit the nail on the head. Many of us (the 60, 70, and 80 yr olds) , with the medical technology available, know that we have 'life/time limiting' conditions (cancer, heart disease....). The silver lining is that with this knowledge of our soon to be limited lifespan; our perspectives change. We view life differently. And the most amazing part is that hard as we may try, there simply is no way to convey this perspective to younger folks.