Teach me to number my days...

"Lord, you have been our dwelling place throughout all generations.
Before the mountains were born or you brought forth the earth and the world,
from everlasting to everlasting you are God.
You turn men back to dust saying 'Return to dust, O sons of men.'
You sweep men away in the sleep of death;
they are like new grass in the morning ---
though in the morning it springs up new,
by evening it is dry and withered.
All our days pass away under your wrath;
we finish our years with a moan.
The length of our days is seventy years - or eighty,
if we have the strength;
yet their span is but trouble and sorrow,
for they quickly pass and we fly away....
Teach us to number our days aright that we might gain a heart of wisdom."

(Psalm 90:1-3,5-6, 9-10, 12)