They shall wander; literally, they shall reel. The verse implies the eagerness of their unsatisfied desire, which seeks everywhere for the revelation which for their sin is denied them. From sea to sea.
This expression is taken, by Keil and others, to mean here "all the world over," as Psalms 72:8; Micah 7:12; Zechariah 9:10; but it is probably used by the prophet in a more restricted sense, as it would not be natural for him to refer in the first place to the seeking of the words of God beyond the limits of the Holy Land.
Therefore "from sea to sea" means from the Sea of Galilee or the Dead Sea to the Mediterranean; and from the north even to the east—from the north round again to the east, the south not being mentioned, because there alone was the true worship of God to be found, and they refused to seek it there (Pusey).
Of course, according to the wide scope taken by prophecy, which is not exhausted by one fulfilment, we may see hero the fate of the Jews to the present time hopelessly seeking Messiah and the Word of God, never finding that which they once recklessly rejected.
By some error the LXX. render, σαλευθήσονται ὕδατα ἀπὸ τῆς θαλάσσης κ. τ. λ; unless they mean, "They shall be tossed as waters," etc.