Isaiah 53:11
11 He shall see of the travail of His soul, and shall be satisfied: by His knowledge shall My righteous servant justify many; for He shall bear their iniquities.
The travail, or anguish, of His soul was for the restoration of man and his dominion as before the fall ( I Cor 15:24-28).
It is by the knowledge of God’s plan that mankind is blessed (Luke 1:77).
The Messiah is called righteous because He did and always will do that which is perfectly right in all things commanded by God. It emphasizes His personal holiness ( I Peter 2:21-22).
To justify means to declare not guilty. Faith comes by knowledge of the Word of God, and such knowledge will justify when obeyed (Rom. 5:1; 10:17).
Jesus has born all our sin. He, and He alone, by the shedding of His blood and His resurrection, has made it possible for us to be reconciled to God.