And you will say in that day: “Give thanks to the LORD, call upon his name, make known his deeds among the peoples, proclaim that his name is exalted.
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...
This is the second part of this evangelical song, and to the same purport with the former; there believers stir up themselves to praise God, here they invite and encourage one another to do it, and are contriving to spread his praise and draw in others to join with them in it. Observe, I.
Commenting on Isaiah 12:4-6
In that day shall ye say, praise the Lord,.... On account of his being and perfections, for blessings received from him, especially spiritual ones; and particularly such as are before mentioned, fulness of grace in him, strength and salvation by him, a view of interest in him as a Saviour, and divine comforts communicated from him; which is done by giving him the glory of them, and thanks for them.