1)
What do we learn from "b'Re'ach Nicho'ach Ertzeh Eschem"?
1.
Malbim: The Re'ach Nicho'ach, which is l'Ratzon, will not be from the Korbanos. Rather, I will be pleased with you yourself b'Re'ach Nicho'ach. It will be a pleasant spirit in front of Me when I take you out of the nations and I am sanctified through you in the eyes of the Goyim.
2)
How will Hashem be sanctified through you?
1.
Radak: This will be in the war of Gog and Magog - "v'Es Shem Kodshi Odi'a b'Soch Ami Yisrael" (39:7).
2.
Malbim: They will see your good deeds and fear My strength, ability and Hashgachah.
