Commentary On Psalm 119:17-18

We are here taught, 1. That we owe our lives to God's mercy. David prays, Deal bountifully with me, that I may live. It was God's bounty that gave us life, that gave us this life; and the same bounty that gave it continues it, and gives all the supports and comforts of it; if these be withheld, we die, or, which is equivalent, our lives are embittered and we become weary of them. If God deals in strict justice with us, we die, we perish, we all perish; if these forfeited lives be preserved and prolonged, it is because God deals bountifully with us, according to his mercy, not according to our deserts. The continuance of the most useful life is owing to God's bounty, and on that we must have a continual dependence. 2. That therefore we ought to spend our lives in God's service. Life is therefore a choice mercy, because it is an opportunity of obeying God in this world, where there are so few that do glorify him; and this David had in his eye: "Not that I may live and grow rich, live and be merry, but that I may live and keep thy word, may observe it myself and transmit it to those that shall come after, which the longer I live the better I shall do."

Observe here, 1. That there are wondrous things in God's law, which we are all concerned, and should covet, to behold, not only strange things, which are very surprising and unexpected, but excellent things, which are to be highly esteemed and valued, and things which were long hidden from the wise and prudent, but are now revealed unto babes. If there were wonders in the law, much more in the gospel, where Christ is all in all, whose name is Wonderful. Well may we, who are so nearly interested, desire to behold these wondrous things, when the angels themselves reach to look into them, 1 Pt. 1:12. Those that would see the wondrous things of God's law and gospel must beg of him to open their eyes and to give them an understanding. We are by nature blind to the things of God, till his grace cause the scales to fall from our eyes; and even those in whose hearts God has said, Let there be light, have yet need to be further enlightened, and must still pray to God to open their eyes yet more and more, that those who at first saw men as trees walking may come to see all things clearly; and the more God opens our eyes the more wonders we see in the word of God, which we saw not before.

Matthew Henry's Commentary on the Whole Bible