O GOD, FORSAKE ME NOT

Psalm 71:18

Now also when I am old and greyheaded, O God, forsake me not; until I have shewed thy strength unto this generation, and thy power to every one that is to come.  

"When we have said all we can, to the glory of God's grace, there is still more to be said; it is a subject that can never be exhausted, and therefore we should never grow weary of it.
 
We must own that all the works of God's goodness to us are wondrous works, admiring he should do so much for us who are so undeserving, and we must make it our business to declare them, to the glory of God and the good of others. 
 
Those that have been taught of God from their youth, and have made it the business of their lives to honour him, may be sure that he will not leave them when they are old and gray-headed, will not leave them helpless and comfortless, but will make the evil days of old age their best days, and such as they shall have occasion to say they have pleasure in. 
 
As long as we live we should be endeavouring to glorify God and edify one another; and those that have had the largest and longest experience of the goodness of God to them should improve their experiences for the good of their friends. 
 
It is a debt which the old disciples of Christ owe to the succeeding generations to leave behind them a solemn testimony to the power, pleasure, and the truth of God's promises."

Matthew Henry