Commentaire sur Isaïe 62:1

For the sake of Zion I will do, and I will not be silent concerning what they did to her.

"for Zion's sake" He came back to speak of two matters which he recalled in the previous section. 1. The righteousness which Gd desires to reveal, the righteousness of Israel and the truth of their Torah and their faith. 2. The salvation which Gd desires to bring to them. Zion represents the righteousness of Israel because Zion was the location of the Sanhedrin and the Holy Temple, and Jerusalem represents the salvation of Israel because there the masses dwelt and to there the scattered ones were gathered, as it is written "...put on your strength, O Zion; put on the garments of your beauty, Jerusalem..." (Is. 52:1) Zion will clothe herself with inner might, the spiritual successes, and Jerusalem external garments - the physical successes. In order to clarify the righteousness of Israel and the truth of their Torah one must argue with words and claims, and on this it says -

For Zion’s sake will I not, etc. Thus Israel will speak, when in exile.