Thou art the God that doest wonders. The Psalmist confirms the preceding sentence, proving the greatness of God from the wonderful character of his works. He does not speak of the hidden and mysterious essence of God which fills heaven and earth, but of the manifestations of his power, wisdom, goodness, and righteousness, which are clearly exhibited, although they are too vast for our limited understandings to comprehend. Literally, the words are, Thou art the God that doest a Wonder; but the singular number is here evidently put for the plural, an instance of which we have seen before. From this we learn that the glory of God is so near us, and that he has so openly and clearly unfolded himself, that we cannot justly pretend any excuse for ignorance. He, indeed, works so wonderfully, that even the heathen nations are inexcusable for their blindness. For this reason it is added, Thou hast made known thy strength among the peoples. This has an immediate reference to the deliverance of the Church; but, at the same time, it shows that the glory of God, which he had clearly and mightily displayed among the nations, could not be despised without the guilt of grievous impiety having been incurred.

Thou art the God that doest wonders - It is, it must be, the characteristic of God, the true God, to do wonderful things; things which are suited to produce amazement, and which we can little hope to be able to understand. Our judgment of God, therefore, should not be hasty and rash, but calm and deliberate.
Thou hast declared thy strength among the people - Thou hast manifested thy greatness in thy dealings with the people. The word "people" here refers not especially to the Hebrew people, but to the nations - the people of the world at large. On a wide scale, and among all nations, God had done that which was suited to excite wonder, and which people were little qualified as yet to comprehend. No one can judge aright of what another has done unless he can take in the whole subject, and see it as he does who performs the act - unless he understands all the causes, the motives, the results near and remote - unless he sees the necessity of the act - unless he sees what would have been the consequences if it had not been done, for in that which is unknown to us, and which lies beyond the range of our vision, there may be full and sufficient reasons for what has been done, and an explanation may be found there which would remove all the difficulty.

Thou - doest wonders - Every act of God, whether in nature or grace, in creation or providence, is wondrous; surpasses all power but his own; and can be comprehended only by his own wisdom. To the general observer, his strength is most apparent; to the investigator of nature, his wisdom; and to the genuine Christian, his mercy and love.

Thou art the God that doest wonders,.... In nature, providence, and grace; it seems chiefly to regard what was done for the Israelites in Egypt, and in the wilderness, see Psalm 78:12,
thou hast declared thy strength among the people; the nations of the world, who heard what the Lord did for Israel by his mighty power, and with an outstretched arm, as follows.

Illustrations of God's power in His special interventions for His people (Exodus. 14:1-31), and, in the more common, but sublime, control of nature (Psalm 22:11-14; Habakkuk 3:14) which may have attended those miraculous events (Exodus 14:24).