A psalm of praise.

“"Jubilate," therefore, "unto the Lord, all you lands" [Psalm 100:1]. This Psalm gives this exhortation to us, that we jubilate unto the Lord. Nor does it, as it were, exhort one particular corner of the earth, or one habitation or congregation of men; but since it is aware that it has sown blessings on every side, on every side it does exact jubilance. Does all the earth at this moment hear my voice? And yet the whole earth has heard this voice. All the earth is already jubilant in the Lord; and what is not as yet jubilant, will be so. For blessing, extending on every side, when the Church was commencing to spread from Jerusalem throughout all nations, [Luke 24:47] everywhere overturns ungodliness, and everywhere builds up piety: the good are mingled with the wicked throughout all lands. Every land is full of the discontented murmurs of the wicked, and of the jubilance of the good. What then is it, "to jubilate"? For the title of the present Psalm especially makes us give good heed to this word, for it is entitled, "A Psalm of confession." What means, to jubilate with confession? It is the sentiment thus expressed in another Psalm: "Blessed is the people that understands jubilance." Surely that which being understood makes blessed is something great. May therefore the Lord our God, who makes men blessed, grant me to understand what to say, and grant you to understand what ye hear: "Blessed is the people that understands jubilance." Let us therefore run unto this blessing, let us understand jubilance, let us not pour it forth without understanding. Of what use is it to be jubilant and obey this Psalm, when it says, "Jubilate unto the Lord, all you lands," and not to understand what jubilance is, so that our voice only may be jubilant, our heart not so? For the understanding is the utterance of the heart.”

“Make a joyful noise unto the Lord, all ye lands. Or, "all the earth" (c); that is, as the Targum, all the inhabitants of the earth, who are called upon to shout unto him as their King; as the angels did at his birth, the disciples when he made his public entrance into Jerusalem, the apostles at his ascension to heaven, the saints when the marriage of him, the Lamb, will be come, and both men and angels when he shall descend from heaven to judge the world; and such a joyful noise or shout should be made unto him as to a triumphant conqueror, who has got the victory over sin, Satan, death, and the grave, and every enemy of his and his people, and made them more than conquerors through himself; see Psa 95:1. (c) "omnis terra", V. L. Pagninus, Montanus, Tigurine version, &c.”

“The call in Psa 100:1 sounds like Psa 98:4; Psa 66:1. כּל־הארץ are all lands, or rather all men belonging to the earth's population. The first verse, without any parallelism and in so far monostichic, is like the signal for a blowing of the trumpets. Instead of "serve Jahve with gladness (בּשׂמחה)," it is expressed in Psa 2:11, "serve Jahve with fear (בּיראה)." Fear and joy do not exclude one another. Fear becomes the exalted Lord, and the holy gravity of His requirements; joy becomes the gracious Lord, and His blessed service. The summons to manifest this joy in a religious, festive manner springs up out of an all-hopeful, world-embracing love, and this love is the spontaneous result of living faith in the promise that all tribes of the earth shall be blessed in the seed of Abraham, and in the prophecies in which this promise is unfolded. דּעוּ (as in Psa 4:4) Theodoret well interprets δι ̓ αὐτῶν μάθετε τῶν πραγμάτων. They are to know from facts of outward and inward experience that Jahve is God: He hath made us, and not we ourselves. Thus runs the Chethξb, which the lxx follows, αὐτὸς ἔποήσεν ἡμᾶς καὶ οὐχ ἡμεῖς (as also the Syriac and Vulgate); but Symmachus (like Rashi), contrary to all possibilities of language, renders αὐτὸς ἐποίησεν ἡμᾶς οὐκ ὄντας. Even the Midrash (Bereshith Rabba, ch. c. init.) finds in this confession the reverse of the arrogant words in the mouth of Pharaoh: "I myself have made myself" (Eze 29:3). The Ker, on the other hand, reads לו, (Note: According to the reckoning of the Masora, there are fifteen passages in the Old Testament in which לא is written and לו is read, viz., Exo 21:8; Lev 11:21; Lev 25:30; Sa1 2:3; Sa2 16:18; Kg2 8:10; Isa 9:2; Isa 63:9; Psa 100:3; Psa 139:16; Job 13:15 cf. the note there, Psa 41:4; Pro 19:7; Pro 26:2; Ezr 4:2. Because doubtful, Isa 49:5; Ch1 11:20 are not reckoned with these.) which the Targum, Jerome, and Saadia follow and render: et ipsius nos sumus. Hengstenberg calls this Ker quite unsuitable and bad; and Hupfeld, on the other hand, calls the Chethb an "unspeakable insipidity." But in reality both readings accord with the context, and it is clear that they are both in harmony with Scripture. Many a one has drawn balsamic consolation from the words ipse fecit nos et non ipsi nos; e.g., Melancthon when disconsolately sorrowful over the body of his son in Dresden on the 12th July 1559. But in ipse fecit nos et ipsius nos sumus there is also a rich mine of comfort and of admonition, for the Creator of also the Owner, His heart clings to His creature, and the creature owes itself entirely to Him, without whom it would not have had a being, and would not continue in being. Since, however, the parallel passage, Psa 95:7, favours ולו rather than ולא; since, further, ולא ,reh is the easier reading, inasmuch as הוּא leads one to expect that an antithesis will follow (Hitzig); and since the "His people and the sheep of His pasture" that follows is a more natural continuation of a preceding ולו אנחנו than that it should be attached as a predicative object to עשׂנוּ over a parenthetical ולא אנחנו: the Ker decidedly maintains the preference. In connection with both readings, עשׂה has a sense related to the history of redemption, as in Sa1 12:6. Israel is Jahve's work (מעשׂה), Isa 29:23; Isa 60:21, cf. Deu 32:6, Deu 32:15, not merely as a people, but as the people of God, who were kept in view even in the calling of Abram.”