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4. And in that day shall ye say. He now exhorts them not only to sing praise and give thanks to God individually, but to excite others to do the same. As he had formerly said, Many people shall go and say, Come ye, and let us go up into the mountain of the Lord, (Isaiah 2:3,) that is, exciting each other by mutual exhortation to embrace the pure worship of God; so after having enjoined them individually to be thankful to God, he now also commands them mutually to excite each other to thanksgiving. He means that they ought to speak not to one, but to all, and not at one time only, but during their whole life.

Call upon his name. ¹⁹⁶¹⁹⁶    {Bogus footnote} He now gives a short description of the manner in which praise is properly rendered to God, when he enjoins us to

call upon him, that we may not glory in any other.
(Jeremiah 9:23,24.)

Hence also, by taking a part for the whole, (συνεκδοχικῶς,) Scripture frequently describes the whole of worship under the designation of calling upon God. In this way we show that our confidence is placed in God; and this is also what he chiefly demands from us. In like manner, I think that here the Prophet connects calling upon God with praises, in order to include the whole of the worship of God.

Make known his works among the peoples. ¹⁹⁷¹⁹⁷    {Bogus footnote} He means that the work of this deliverance will be so excellent, that it ought to be proclaimed, not in one corner only, but throughout the whole world. He wished, indeed, that it should be first made known to the Jews, but that it should afterwards spread abroad to all men. This exhortation, by which the Jews testified their gratitude, might be regarded as a forerunner of the preaching of the gospel, which afterwards followed in the proper order. As the Jews proclaimed among the Medes and Persians, and other neighboring nations, the favor which had been showed to them, so, when Christ was manifested, they ought to have been heralds to sound aloud the name of God through every country in the world. Hence it is evident what is the desire which ought to be cherished among all the godly. It is, that the goodness of God may be made known to all, that all may join in the same worship of God. We ought especially to be inflamed with this desire, after having been delivered from some alarming danger, and most of all after having been delivered from the tyranny of the devil and from everlasting death.

5. Sing unto the Lord He continues his exhortation, showing what is the feeling from which this thanksgiving ought to proceed; for he shows that it is our duty to proclaim the goodness of God to every nation. While we exhort and encourage others, we must not at the same time sit down in indolence, but it is proper that we set an example before others; for nothing can be more absurd than to see lazy and slothful men who are exciting other men to praise God.

For he hath done glorious things. When he asserts that God hath done gloriously, he means that there is abundant ground for singing. The Lord does not wish that his praises should be proclaimed without any reason, but holds out a very rich and very abundant subject of praise, when he frees his people from very hard bondage. We have said that this song is not limited to a short period, but, on the contrary, extends to the whole of Christ’s reign. This work therefore is truly glorious, that God sent his Son to reconcile us to himself, (John 3:16, 17,) and to destroy the dominion of death and the devil. (Hebrews 2:14.) If, therefore, we consider the work of our deliverance as we ought to do, we shall have very abundant ground for praising God.

And this hath been made known through all the earth. When he says that this hath been made known, he glances at the calling of the Gentiles, and confirms what has been already stated, that the work is such as ought not to be concealed in a corner, but to be everywhere proclaimed.

6. Shout and sing. He again exhorts the godly to rejoice in the Lord, at the same time reminding them what is the nature of true joy, and on what it is founded. We have no other happiness than to have God dwelling in the midst of us. But for this, our life would be wretched and unhappy, though we should have abundance of other blessings and of every kind of riches. Now, if our heart be set on our treasure, (Matthew 6:21,) this happiness will attract all our feelings.

The Holy One of Israel. He calls him the Holy One, in order to inform us what he intends to prove himself to be to us, while he dwells with us; that is, that not only his majesty may fill our minds with reverence towards him, for it would at the same time overwhelm us with terror; but that he may vouchsafe to make us the objects of his peculiar care, though separated from the rest of the world. He calls him the Holy One, from the effect produced; for, by gathering us to himself, (Ephesians 1:10,) and saving us by his grace, he may be said to sanctify us to be his own property. Accordingly, if God is with us, the conviction of his presence will fill us with inconceivable joy. Hence it follows that, when he is absent, we continue to be exposed to grief and sadness.

By the words, Shout and sing, he means that when God magnifies his power in the midst of us, he gives us occasion for no ordinary joy. Again, by directly addressing the inhabitants of Zion, he intimates that all are not capable of so great a blessing, and at the same time indirectly exhorts them to maintain unity of faith, that, by being united to the Church, we may partake of this blessed joy.