Isaiah 42: Jesus promised

"Here is my servant, whom I uphold,
my chosen one in whom I delight;
I will put my Spirit on him,
and he will bring justice to the nations. He will not shout or cry out,
or raise his voice in the streets. This is what God the Lord says—
the Creator of the heavens, who stretches them out,
who spreads out the earth with all that springs from it,
who gives breath to its people,
and life to those who walk on it: "I, the Lord, have called you in righteousness;
I will take hold of your hand.
I will keep you and will make you
to be a covenant for the people
and a light for the Gentiles, to open eyes that are blind,
to free captives from prison
and to release from the dungeon those who sit in darkness.
Sing to the Lord a new song,
his praise from the ends of the earth,
you who go down to the sea, and all that is in it,
you islands, and all who live in them. (Isaiah 42:1, 2, 5-7, 10 NIV)

Wow I read this promise and see it as if it was written after Jesus came about what he did. God fulfilled his promise more than Israel could have expected.
I wonder if the prisoner is humans in the prison of their sin and flesh. I have always read it literally but maybe God just gave me a new understanding.

Thank you Jesus
Let us sing this new song of Christ Jesus the Lord
To his praise and glory forever!
Amen