Isaiah 49: 7-8.
7 Thus saith the Lord, the Redeemer of Israel, and His Holy One, to Him Whom man despiseth, to Him Whom the nation abhorreth, to a Servant of rulers, Kings shall see and arise, princes also shall worship, because of the Lord that is faithful, and the Holy One of Israel, and He shall choose Thee.
8 Thus saith the Lord, In an acceptable time have I heard Thee, and in a day of salvation have I helped Thee: and I will preserve Thee, and give Thee for a covenant of the people, to establish the earth, to cause to inherit the desolate heritages;
Jesus was indeed despised and rejected of men. His own nation rejected Him without cause, choosing instead to free a notorious criminal, Barabbas, and allow Jesus to be crucified. Jesus would be rejected by Israel, but accepted and honored of God, with strength for all He would be called upon to suffer.
That He would be a servant of rulers means that, although He was God, He was also man and submitted to human laws and earthly rulers (v. 7; Ps. 2:2; Mt. 27:41).
Kings and princes will worship Him, which proves Him to be Divine and not Isaiah or some other ordinary man, and certainly not the church or Israel, as some think.
Verse 8 is quoted in 2 Cor. 6:2. As used here of the Messiah, it does not mean personal salvation from sin, for He knew no sin; it refers to hearing and helping Him in the the day that God would be gracious and provide salvation for all men. God would not only hear and help Him, but would preserve and give Him to be the Maker of a new covenant to the people, to establish the earth and to restore and cause the waste places of earth to be inhabited.