For thy mercy is great unto the heavens ... - See this explained in the notes at Psalm 36:5.

Thy mercy is great unto the heavens - It is as far above all human description and comprehension as the heavens are above the earth. See the notes on Psalm 36:5, Psalm 36:6, where nearly the same words occur.

For thy mercy is great unto the heavens,.... Which denotes the exceeding greatness and largeness of it; as it is in the heart of God, who is plenteous in mercy; as it is expressed in the covenant of grace, where are stores of it; as it is shown forth in the choice of persons to eternal life; in the mission of Christ into this world to die for them; in the regeneration of them, the pardon of their sins, and eternal life: and this mercy is not only extended to persons in the several parts of the earth, but is as high as the heaven above it, Psalm 103:11;

and thy truth unto the clouds; the faithfulness of God in performing his purposes and his promises; or the Gospel, and the doctrines of it, which contain the deep things of God; unless Christ himself should be meant, who is the truth which sprung out of the earth, Psalm 85:11; is now ascended unto heaven, and is higher than the heavens; and whose exaltation and glory may be designed in Psalm 57:11.

For thy mercy is great unto the heavens, and thy truth unto the {k} clouds.

(k) Your mercies not only belong to the Jews, but also to the Gentiles.

57:7-11 By lively faith, David's prayers and complaints are at once turned into praises. His heart is fixed; it is prepared for every event, being stayed upon God. If by the grace of God we are brought into this even, composed frame of mind, we have great reason to be thankful. Nothing is done to purpose, in religion, unless it is done with the heart. The heart must be fixed for the duty, put in frame for it; fixed in the duty by close attention. Our tongue is our glory, and never more so than when praising God; dull and sleepy devotions will never be acceptable to God. Let us awake early in the morning, to begin the day with God; early in the beginning of a mercy. When God comes toward us with his favours, let us go forth to meet him with our praises. David desired to bring others to join in praising God; and in his psalms, he is still praising God among the people, singing to Him among the nations. Let us seek to have our hearts fixed to praise his boundless mercy and unfailing faithfulness; and to glorify him with body, soul, and spirit, which are his. Let us earnestly pray that the blessings of the gospel may be sent through every land.