Bible: Teach us to number our days

Psalm 90 vs. 12

So teach us to number our days, that we may apply our hearts unto wisdom.

1. You need to number your days to know the years you have spent on earth and your successes and challenges.
2. You need to number your dates to estimate the likely years remaining for you on earth, assuming you live up to 70 and what you wish to achieve in the remaining years.