Charles Ellicott Commentary Isaiah 62:1

"For Zion`s sake will I not hold my peace, and for Jerusalem`s sake I will not rest, until her righteousness go forth as brightness, and her salvation as a lamp that burneth." — Isaiah 62:1 (ASV)

For Zion’s sake ... — Opinions again differ as to the speaker. Is he the prophet, the Servant of Jehovah, or Jehovah Himself? On the whole, the second view seems most in harmony with what follows. The true Servant will carry on what, in the language of later theology, may be called his mediatorial intercessory work, so that there may be no delay in the fulfillment of the glorious promises that have just been uttered.

As brightness. — Better, as the brightness of morning, as the word is used this way in Isaiah 60:3 and Proverbs 4:18.

As a lamp ... — Better, as a burning torch.