By the word of Jehovah. That he may stir us up to think more closely of God's works, he brings before us the creation of the world itself; for until God be acknowledged as the Creator and Framer of the world, who will believe that he attends to the affairs of men, and that the state of the world is controlled by his wisdom and power? But the creation of the world leads us by direct consequence to the providence of God. Not that all men reason so justly, or are endued with so sound a judgment, as to conclude that the world is at this day maintained by the same divine power which was once put forth in creating it: on the contrary, the great majority imagine that he is an idle spectator in heaven of whatever is transacted on earth. But no man truly believes that the world was created by God unless he is also firmly persuaded that it is maintained and preserved by him. Wisely and properly, therefore, does the prophet carry us back to the very origin of the world, in order to fix in our minds the certainty of God's providence in the continual order of nature. By the figure synecdoche, he uses the term heavens for the whole fabric of the world, because, as I have elsewhere remarked, the sight of the heavens more than all the other parts of creation transports us with admiration. He therefore immediately adds, And all the host of them, by which phraseology, according to the usual method of Scripture, he means the stars and planets; for if the heavens were destitute of this ornament, they would in a manner be empty. In saying that the heavens were created by the word of God, he greatly magnifies his power, because by his nod alone, without any other aid or means, and without much time or labor, he created so noble and magnificent a work. But although the Psalmist sets the word of God and the breath of his mouth in opposition both to all external means, and to every idea of painful labor on God's part, yet we may truly and certainly infer from this passage, that the world was framed by God's Eternal Word, his only begotten Son. Ancient interpreters have, with considerable ingenuity, employed this passage as a proof of the eternal Deity of the Holy Spirit against the Sabellians. But it appears from other places, particularly from Isaiah 11:4, that by the breath of the mouth is meant nothing else but speech. For it is there said concerning Christ, "He shall smite the earth with the rod of his mouth, and with the breath of his lips shall he slay the wicked." As powerful and effective speech is there allegorically denominated the rod of his mouth; so in like manner, for another purpose it is denominated in the immediately succeeding clause the breath of his mouth, to mark the difference that exists between God's speech and the empty sounds which proceed from the mouths of men. In proving the Divinity of the Holy Spirit, therefore, I durst not press this text against Sabellius. Let us account it sufficient that God has formed the heavens by his Word in such a manner as to prove the eternal Deity of Christ. Should any object that these divine persons would not appear distinct if the terms Word and Breath are synonymous; I answer, that the term breath is not employed here simply as in other places, in which there is evidently a distinction made between the Word and the Spirit; but the breath of his mouth is used figuratively for the very utterance of speech; as if it had been said, As soon as God uttered the breath of his mouth, or proclaimed in word what he wished to be done, the heavens were instantly brought into existence, and were furnished, too, with an inconceivable number and variety of stars. It is indeed true that this similitude is borrowed from men; but the Scriptures often teach in other places, that the world was created by that Eternal Word, who, being the only begotten Son of God, appeared afterwards in flesh.

By the word of the Lord - By the command of God: Genesis 1:3, Genesis 1:6 etc. See the notes at Psalm 33:9.
Were the heavens made - That is, the starry heavens; the worlds above us: Genesis 1:1.
And all the host of them - All their "armies." The stars are represented as armies or marshalled hosts, led forth at his command, and under his direction - as armies are led forth in war. See Genesis 2:1; compare the notes at Isaiah 1:9.
By the breath of his mouth - By his word or command - as our words issue from our mouths with our breath. The idea here is, that God is the Creator of all things; and, as such, has a claim to praise; or, that as Creator he is entitled to adoration. To this he is entitled from the fact that he has made all things, and from the "manner" in which it has been done - the wisdom, power, goodness, skill, with which it has been accomplished.

By the word of the Lord were the heavens made - This is illustrated in the Psalm 33:9 verse: "He spake, and it was done; he commanded, and it stood fast." This evidently refers to the account of the creation, as it stands in the first chapter of Genesis.

By the word of the Lord were the heavens made,.... The aerial and starry heavens, and the heaven of heavens, the third heaven, the seat of the divine Majesty, and the habitation of angels and glorified saints; these were "made" even out of nothing, not out of any pre-existent matter, nor were they eternal; and being made are creatures, and so not to be worshipped, neither they nor their hosts after mentioned; angels, sun, moon, and stars; these were made by the Word of God, the essential Word of God, the Lord Jesus Christ, who often goes by this name, John 1:1; and very fitly agrees with him, who spoke for all his people in the council and covenant of grace, and undertook to be their surety; is the Word spoken of by all the holy prophets since the beginning of the world; is the interpreter of his Father's mind and will, of which he must be capable, since he lay in his bosom; and now he speaks for his saints in heaven, whose advocate he is; and especially he may be so called because he so often spake on the six days of creation, and said, let this and the other thing be, and it was so; and to him, as the Word of God, is the creation of all things frequently ascribed, John 1:1, Hebrews 11:3, and particularly the heavens, Hebrews 1:10. This is a proof of the deity of Christ, and of the dignity of his person; and shows how fit he is to be the Saviour of men; how safe the saints are in his hands; and that he ought to be trusted in, adored, and worshipped;
and all the host of them by the breath of his mouth: by "the host" of the heavens are meant the angels of heaven, who dwell in the third heaven, and are the militia of it; they are called the heavenly host, Luke 2:13; these are under Jehovah, as their Lord and King, and are the army among whom he does according to his will, 1-Kings 22:19; these attended him whenever he has made any remarkable appearance; and they have been employed by him against his enemies, and in defence of his people, about whom they encamp, 2-Kings 19:35. The sun, moon, and stars, are the host of the next heaven, these are ranged in their proper order by the Lord, and he keeps the muster roll of them, Isaiah 40:26; and these are used by him as his militia; the stars in their courses fought against Sisera, Judges 5:20; and the winged tribe are the host of the lower heaven; and even the lower class of these, as the locusts and grasshoppers, go forth in bands and troops, and encamp in the hedges, and at the command of God pass through and devour whole countries, Proverbs 30:27; and all these are made by "the breath" or "spirit (z) of Jehovah's mouth"; that is, by the Spirit of God, the third Person in the Trinity; a name which is suitable to him who is breathed forth, and proceeds from the Father and the Son, and to whom creation is ascribed, Genesis 1:2; and which is no inconsiderable proof of his deity; and shows that he must be equal to the work of sanctification, which he begins and carries on. Now though the creation of the heavens is attributed to the Word, and the host of them to the Spirit, yet we are not to suppose that one Person took one part, and another Person another part of the creation; but they were all, Father, Word, and Spirit, jointly concerned in the whole.
(z) "spiritu oris ejus", V. L. Gejerus, Michaelis; so Ainsworth.

In "word" and "breath"--or, "spirit," there may be an allusion to the Son (John 1:1) and Holy Spirit.

God's praiseworthiness (b) as the Creator of the world in the kingdom of Nature. Jahve's דּבר is His almighty "Let there be;" and רוח פּיו (inasmuch as the breath is here regarded as the material of which the word is formed and the bearer of the word) is the command, or in general, the operation of His commanding omnipotence (Job 15:30, cf. Job 4:9; Isaiah 34:16, cf. Psalm 11:4). The heavens above and the waters beneath stand side by side as miracles of creation. The display of His power in the waters of the sea consists in His having confined them within fixed bounds and keeping them within these. נד is a pile, i.e., a piled up heap (Arabic nadd), and more especially an inference to harvest: like such a heap do the convex waters of the sea, being firmly held together, rise above the level of the continents. The expression is like that in Joshua 3:13, Joshua 3:15, cf. Exodus 15:8; although there the reference is to a miracle occurring in the course of history, and in this passage to a miracle of creation. כּנס refers to the heap itself, not to the walls of the storehouses as holding together. This latter figure is not introduced until Psalm 33:7: the bed of the sea and those of the rivers are, as it were, אוצרות, treasuries or storehouses, in which God has deposited the deep, foaming waves or surging mass of waters. The inhabitants (ישׁבי, not יושׁבי) of the earth have cause to fear God who is thus omnipotent (מן, in the sense of falling back from in terror); for He need only speak the word and that which He wills comes into being out of nothing, as we see from the hexameron or history of Creation, but which is also confirmed in human history (Lamentations 3:37). He need only command and it stands forth like an obedient servant, that appears in all haste at the call of his lord, Psalm 119:91.

The word - God made this admirable structure of the heavens, and all its glorious stars; not with great pains and time, but with one single word. Host - The angels: or the stars.