Isaiah 43:10-12. “Ye are My witnesses, saith the Lord, and My servant whom I have chosen: that ye may know and believe Me, and understand that I am He: before Me there was no God formed, neither shall there be after Me. I, even I, am the Lord: and beside Me there is no Savior. I have declared, and have saved, and I have shewed, when there was no strange god among you: therefore ye are My witnesses, saith the Lord, that I am God.”
The Jews were Jehovah’s witnesses and His servants whom He had chosen. They were cut off from being the peculiar people of God when they rejected their Messiah; and now the Gentiles have this place as a people (Mat. 21:33-45; Rom. 11). The Jews will be received again at the second advent of Christ; they will become witnesses of Jehovah again, and will literally evangelize the nations in the Millennium (2:2-4; 11:3-12; 52:7; Zech. 8:23; Rom. 1:25-29).
The Jews were chosen that they might know Him, believe Him, understand that He is God; and that they may witness that He is God.
When they worshiped no other gods, they were able to be the witnesses God had chosen them to be. But when they turned to idols, they lost their privileged position. When they rejected Messiah at His first coming, they were replaced as witnesses by the Gentile nations.
Restoration will come when Jesus Christ returns to set up His kingdom and establish His thousand-year reign. The Jews will return to Him, and will be the witnesses who will take the gospel to the Gentile nations.