5. Thus saith Jehovah. He confirms what he said in the beginning of the chapter about the reign of Christ, that he will renew and restore all things; and as this might be thought to be incredible, he has here added a magnificent description of the power of God, by which our faith ought to be confirmed, especially when the outward aspect of things is directly contrary. On this account he brings forward clear proofs of the power of God, that all may be aroused by the mention of them, and may be convinced that he who created all things out of nothing, who spread out the heavens, who produced vegetation, who gave life to animals, and who upholds and defends all things by his power, will easily perform what he promises concerning the reign of Christ. These forms of expression remind us that we ought always to consider the power of God, that we may be fully convinced of the authority and undoubted certainty of his word; for it is not without reason that Isaiah makes this preface, but in order to remove every doubt, because nothing is too hard for God, who keeps the whole world in subjection to his authority; and in the following chapters he will employ similar modes of expression.
האל ( hael) is rendered by some “powerful,” and by others “God;” but it is of little consequence, for the meaning is the same; because he exhibits his power and majesty, and adorns him with this variety of titles, that we may know that he will easily restore all that is fallen and laid low.