For every morbid person who thinks pathologically about death,
there are probably a million more
who do not think about it enough.
 
When Moses thought about the brevity of life he prayed:
“Teach us to number our days
that we might present to you a heart of wisdom” (Psalm 90:12). 

“Get correct views of life,
and learn to see the world in its true light.
It will enable you to live pleasantly,
to do good, and, when summoned away,
to leave without regret.” 

It is good to ponder our death. 
We should live well that we might die well. 
And part of living well is finding out how to face your last enemy.
– John Piper