He is the {c} Rock, his work is perfect: for all his ways are judgment: a God of truth and without iniquity, just and right is he.

(c) Or mighty God; noting that only God is mighty, faithful and constant in his promise.

Wesley's Notes

32:4 A rock - As for the stability of his nature, and invincibleness of his power, so also for his fixedness and immutability in his counsels and promises and ways; so that is there shall be a sad change in your affairs, remember that this proceeds from yourselves and from the change of your ways towards God, and not from God, in whom there is no variableness or shadow of change, Jam 1:17. His work - All his works and actions are unblameable, perfect, wise and righteous. His ways - All his administrations in the world and particularly with you are managed with wisdom and justice. A God of truth - Constant to his promises: you cannot accuse him of any unfaithfulness to this day.

Jamieson-Fausset-Brown Bible Commentary

4. He is the Rock-a word expressive of power and stability. The application of it in this passage is to declare that God had been true to His covenant with their fathers and them. Nothing that He had promised had failed; so that if their national experience had been painfully checkered by severe and protracted trials, notwithstanding the brightest promises, that result was traceable to their own undutiful and perverse conduct; not to any vacillation or unfaithfulness on the part of God (Jas 1:17), whose procedure was marked by justice and judgment, whether they had been exalted to prosperity or plunged into the depths of affliction.

Matthew Henry's Concise Commentary

32:3-6 He is a Rock. This is the first time God is called so in Scripture. The expression denotes that the Divine power, faithfulness, and love, as revealed in Christ and the gospel, form a foundation which cannot be changed or moved, on which we may build our hopes of happiness. And under his protection we may find refuge from all our enemies, and in all our troubles; as the rocks in those countries sheltered from the burning rays of the sun, and from tempests, or were fortresses from the enemy. His work is perfect: that of redemption and salvation, in which there is a display of all the Divine perfection, complete in all its parts. All God's dealings with his creatures are regulated by wisdom which cannot err, and perfect justice. He is indeed just and right; he takes care that none shall lose by him. A high charge is exhibited against Israel. Even God's children have their spots, while in this imperfect state; for if we say we have no sin, no spot, we deceive ourselves. But the sin of Israel was not habitual, notorious, unrepented sin; which is a certain mark of the children of Satan. They were fools to forsake their mercies for lying vanities. All wilful sinners, especially sinners in Israel, are unwise and ungrateful.