To shew that the Lord is upright - That is, This will be a proof that God is faithful to his promises; that he is the true friend of his people. The fact that they live long - that they are happy and useful even in old age, will be a demonstration that God is the friend of virtue, and that he deals with people according to their character.

He is my rock - He is my defense; that which constitutes my security. See the notes at Psalm 18:2. This is language of strong confidence in view of all that is said in the psalm.

And there is no unrighteousness in him - This is said in the most absolute form - implying the most entire confidence. God is altogether to be trusted. There is no evil or wrong in his character or in his dealings. In all respects he is worthy of confidence: "worthy" to be loved, trusted, adored, obeyed, by the inhabitants of all worlds. What a sublime thought is this! What a consolatory truth! What would the universe be if God, a Being of infinite POWER, were not a Being of perfect RIGHTEOUSNESS, and could not be trusted by the creatures which he has made!

To show that the Lord is upright - Such persons show how faithful God is to his promises, how true to his word, how kind to them who trust in him. He is the Rock, the Fountain, whence all good comes.

There is no unrighteousness in him - He does nothing evil, nothing unwise, nothing unkind. He is both just and merciful.

To show that the Lord is upright,.... Or righteous, that is, faithful; as he is in his counsels, covenant, and promises, which he makes good by causing his people to grow and flourish, and become fruitful; by carrying on the work of grace upon their souls, and by preserving them to the end safe to his kingdom and glory; by all which it appears that he does not and will not suffer his faithfulness to fail: the Targum is,

"that the inhabitants of the earth may show, &c.''

he is my Rock; the psalmist sets his seal to the truth of God's faithfulness, firmness, and constancy, calling him a Rock for his strength and stability, and claiming his interest in him; declaring he found him to be so by experience,

even the Rock whose work is perfect; who always completes what he undertakes, and finishes what he begins, and will not forsake the work of his own hands:

just and right is he; the Rock of ages, that remains firm, steadfast, and unalterable in all generations:

and there is no unrighteousness in him; as not in his sovereign acts of grace, so neither in his providential dispensations, either towards good men or bad men; not in suffering the wicked to prosper, as in Psalm 92:7, and the righteous to be afflicted; nor in punishing bad men here, or hereafter; nor in justifying sinners by the righteousness of his Son, and giving them the crown of righteousness at the last day: all his proceedings are in the most just and equitable manner; see Romans 9:14.

To shew that the LORD is upright: he is my rock, and there is no unrighteousness in him.

15. and they thus declare God's glory as their strong and righteous ruler.

92:7-15 God sometimes grants prosperity to wicked men in displeasure; yet they flourish but for a moment. Let us seek for ourselves the salvation and grace of the gospel, that being daily anointed by the Holy Spirit, we may behold and share the Redeemer's glory. It is from his grace, by his word and Spirit, that believers receive all the virtue that keeps them alive, and makes them fruitful. Other trees, when old, leave off bearing, but in God's trees the strength of grace does not fail with the strength of nature. The last days of the saints are sometimes their best days, and their last work their best work: perseverance is sure evidence of sincerity. And may every sabbath, while it shows forth the Divine faithfulness, find our souls resting more and more upon the Lord our righteousness.