Psalms 90:12

Those who would learn true wisdom, must pray for Divine instruction, must beg to be taught by the Holy Spirit; and for comfort and joy in the returns of God's favour. They pray for the mercy of God, for they pretend not to plead any merit of their own. His favour would be a full fountain of future joys. It would be a sufficient balance to former griefs. Let the grace of God in us produce the light of good works. And let Divine consolations put gladness into our hearts, and a lustre upon our countenances. The work of our hands, establish thou it; and, in order to that, establish us in it. Instead of wasting our precious, fleeting days in pursuing fancies, which leave the possessors for ever poor, let us seek the forgiveness of sins, and an inheritance in heaven. Let us pray that the work of the Holy Spirit may appear in converting our hearts, and that the beauty of holiness may be seen in our conduct.

So teach us to number our days. Instruct us to set store by time, mourning for that time past wherein we have wrought the will of the flesh, using diligently the time present, which is the accepted hour and the day of salvation, and reckoning the time which lieth in the future to be too uncertain to allow us safely to delay any gracious work or prayer. Numeration is a child's exercise in arithmetic, but in order to number their days aright the best of men need the Lord's teaching. We are more anxious to count the stars than our days, and yet the latter is by far more practical. That we may apply our hearts unto wisdom. Men are led by reflections upon the brevity of time to give their earnest attention to eternal things; they become humble as they look into the grave which is so soon to be their bed, their passions cool in the presence of mortality, and they yield themselves up to the dictates of unerring wisdom; but this is only the case when the Lord himself is the teacher; he alone can teach to real and lasting profit. Thus Moses prayed that the dispensations of justice might be sanctified in mercy. "The law is our school master to bring us to Christ", when the Lord himself speaks by the law. It is most meet that the heart which will so soon cease to beat should while it moves be regulated by wisdom's hand. A short life should be wisely spent. We have not enough time at our disposal to justify us in misspending a single quarter of an hour. Neither are we sure of enough life to justify us in procrastinating for a moment. If we were wise in heart we should see this, but mere head wisdom will not guide us aright.