The days of our lives, for all of us, are numbered. We know that. And yes, there are certainly times when we aren't able to muster as much strength and patience as we would like. It's called being human.
“Mirth is like a flash of lightning, that breaks through a gloom of clouds, and glitters for a moment; cheerfulness keeps up a kind of daylight in the mind, and fills it with a steady and perpetual serenity.”