Humans could lose their lives in the blink of an eye but it played no real significance. Not in the world Hannibal came from. Everyone was mortal, everyone would die. But here, the reminder of mortality was greater simply because not everyone could die.
"To accept death." Hannibal answered. "To accept its inevitability. It is the only way you can truly appreciate life. I presume you will outlive many of us.."