God have done marvelous things, things planned long ago

Isaiah 25:1-12
O Lord, you are my God; I will exalt you and praise your name, for in perfect faithfulness you have done marvelous things, things planned long ago.
He will swallow up death forever. The Sovereign Lord will wipe away the tears from all faces; he will remove the disgrace of his people from all the earth.
"Surely this is our God; we trusted in him, and he saved us. This is the Lord, we trusted in him; let us rejoice and be glad in his salvation."
On this mountain the Lord Almighty will prepare a feast of rich food for all peoples.
The hand of the Lord will rest on this mountain.
God removes the cloud of sorrow that has been hanging over all the nations.
A song of joy in God, who makes the weak and helpless his concern, leads into a description of the joys awaiting God's people on the far side of judgment.
Why?
Moab: The current enemy of God's people stands for all such enemies.
All things planned long ago, God's plan will be done, his mind will be executed.
God is righteousness and his judgement will wipe the tear of all faces, let us rejoice and be glad in his salvation.
The mountain is the Holy place of the Lord, he will be there when the day is come. All his people will be there to worship the Lord and enjoy his banquet.
Mountain has high and strong symbol.
How?
Surely this is our God, be faithful and still before Him. The Lord will do marvelous thing for me. I will exalt you and praise your name, O Lord!