Isaiah 12's Prayer

The short chapter of Isaiah 12 in its entirety is a prayer of confession and comfort, but also a declaration of a promise and thanksgiving. The reason for this exclamatory prayer in Isaiah 12, which begins “In that day”, is found in the verses leading up to it; Thus we read in Isaiah 11:10-16: "And in that day there shall be a Root of Jesse, Who shall stand as a banner to the people; For the nations shall seek Him, and His resting place shall be glorious. It shall come to pass in that day that YHVH shall set His hand again the second time to recover the remnant of His people who are left…  He will set up a banner for the nations, and will assemble the outcasts of Israel, and gather together the dispersed of Judah from the four corners of the earth.  Also the envy of Ephraim shall depar t, and the adversaries of Judah shall be cut off; Ephraim shall not envy Judah, and Judah shall not harass Ephraim.  But they shall fly down upon the shoulder of the Philistines toward the west; together they shall plunder the people of the East; they shall lay their hand on Edom and Moab; and the people of Ammon shall obey them…   There will be a highway for the remnant of His people who will be left from Assyria, as it was for Israel in the day that he came up from the land of Egypt.”  Now back (and forward) to Isaiah 12:1: “And in that day [being the day mentioned in 11:11] you will say: ‘O YHVH, I/we will praise You; though You were angry with me/us [Israel], Your anger is turned away, and You comfort me/us [Israel].  Behold, Elohim is my/our salvation, I/we will trust and not be afraid; 'For YAH, YHVH is my/our strength and song; He also has become my/our salvation [through Yeshua].’ Therefore with joy you/we will draw water from the wells of salvation [from the root of Jesse].  And in that day you/we will say: ‘Praise YHVH, call upon His name; declare His deeds [that is: keeping covenant and restoring the remnant of His people the whole house of Israel] among the peoples, make mention that His name is exalted.  Sing to YHVH, for He has done excellent things; this is known in all the earth [the testimony of YHVH’s faithfulness to His covenant] Cry out and shout, O inhabitant of Zion, for great is the Holy One of Israel in your midst!"  (emphases added).

What are the excellent things that YHVH has done, and is doing, other than bringing to fulfillment what He covenanted with the forefathers of Israel and Judah and what He promised through the prophets of old?  Together we can all exclaim that He is just and faithful!