(16) Come.--Refers back to Psalm 66:9.

Verses 16-20. - In conclusion, the psalmist calls on all pious Israelites to "hearken," while he explains to them how it is that his prayers and vows have been so effectual. It has been because his prayers and vows proceeded from a sincere and honest heart, one which was free from "iniquity" (ver. 18). As Hengstenberg points out, this portion of the psalm is didactic, and inculcates the lesson "that there is no way of salvation except that of well doing." God, by answering the psalmist's prayer, and giving the deliverance for which he had entreated, had set his testimony to the fact of the psalmist's integrity (vers. 19, 20). Verse 16. - Come and hear, all ye that fear God. The address is scarcely to all that have any sense of religion anywhere, as Professor Cheyne suggests, but rather to the religious section of his own nation - the "righteous" or "godly" of other psalms. They are invited to draw near, and be received into the psalmist's confidence. And I will declare what he hath done for my soul. What God had done for the psalmist was to give him confidence and assurance. He knew that his prayers would be ineffectual unless his heart was pure. God heard him, and then he became sure that he was free from the "great transgression" (Cheyne).

66:13-20 We should declare unto those that fear God, what he has done for our souls, and how he has heard and answered our prayers, inviting them to join us in prayer and praise; this will turn to our mutual comfort, and to the glory of God. We cannot share these spiritual privileges, if we retain the love of sin in our hearts, though we refrain from the gross practice, Sin, regarded in the heart, will spoil the comfort and success of prayer; for the sacrifice of the wicked is an abomination of the Lord. But if the feeling of sin in the heart causes desires to be rid of it; if it be the presence of one urging a demand we know we must not, cannot comply with, this is an argument of sincerity. And when we pray in simplicity and godly sincerity, our prayers will be answered. This will excite gratitude to Him who hath not turned away our prayer nor his mercy from us. It was not prayer that fetched the deliverance, but his mercy that sent it. That is the foundation of our hopes, the fountain of our comforts; and ought to be the matter of our praises.Come and hear, all ye that fear God,.... Who have a reverential affection for him, and by whom he is worshipped and served with reverence and godly fear; these have good things done for themselves, and will glorify God for what he does for others: these know the nature, worth, and value of the good things the Lord does for the souls of men, and hear them with pleasure and profit; when to tell them to others is casting pearl before swine, and giving that which is holy to dogs; and therefore only such as fear the Lord are called upon to come and hear what follows. Jarchi interprets this character of proselytes; see Acts 13:26;

and I will declare what he hath done for my soul: not what he had done for God, or offered unto him, or suffered for his sake; nor what God had done for his body in the make and preservation of it; but what he had done for his soul, and the salvation of that: what God the Father had done in setting him apart for himself; in making a sure, well ordered, and everlasting covenant with him in Christ; in blessing him with all spiritual blessings in him; in providing for the redemption of his soul by him; in pardoning his sins, justifying his person, adopting him into his family, and regenerating, quickening, and sanctifying him: also what God the Son had done for him; in engaging to assume a true body and a reasonable soul on his account; and to make that soul an offering for his sin, and thereby obtain for him eternal redemption, even the salvation of his immortal soul: likewise what God the Spirit had done for him; in quickening and enlightening his soul; in implanting principles of grace and holiness in it; in showing Christ unto him, and bringing near his righteousness, and leading him to him for salvation and eternal life; in applying exceeding great and precious promises to him, and remembering to him such on which he had caused him to hope; in delivering him out of temptation and troubles, and in carrying on the work of his grace in him hitherto: these are things that are not to be concealed in a man's breast, but to be told to the church and people of God, to their joy and comfort, and to the glory of divine grace; see Mark 5:19.