I will strengthen them in the Lord - I, the God of Israel, will strengthen them in the Lord-Jesus, the Messiah; and thus indeed the Chaldee: I will strengthen them, דיי בימרא bemeymre dayai, in or by the Word of Jehovah, the same personal Word which we so often meet with in the Chaldee paraphrases or Targum.
They shall walk up and down in his name - In the name of the Messiah. Saith the Lord - God speaks here, not of himself, but concerning his Christ. The Jews shall have complete liberty; they shall appear everywhere as a part of the flock of Christ, and no difference be made between them and the converted Gentiles. They shall be all one fold under one Shepherd and Bishop of all souls.
I will strengthen them in the Lord - As our Lord said to Paul, “My strength is made perfect in weakness,” and Paul said in turn, “When I am weak, then am I strong. And in His Name shall they walk up and down,” have their whole conversation (Dionysius), “in Him according to His will, and diligent in all things to speak and act in ills grace and divine hope.” Jerome: “Christians walk in the Name of Christ, and there is written on the new white stone given to them a “new name” Revelation 2:17, and under the dignity of a name so great, they walk with God, as “Enoch walked and pleased God and was translated” Genesis 5:24.
Saith the Lord - Dionysius: “Again the Lord God speaks of the Lord God, as of Another, hinting the plurality of Persons in the Godhead.”