Kabbalah sa Isaias 12:2: Sha'arei Orah

Now, it is with Understanding-Binah, which is Expansiveness-Rechovot-רחובות, and is the secret of Fifty-Chameesheem-חמישים, that we went out of Egypt-Mitzrayim-מצרים, and it is the secret of salvations and redemptions, as we have explained. The verse therefore states,⁷⁰Exodus 15:2, recited in the Pesukei d’Zimra as part of the Song of the Sea. “The might and vengeance of Ya”h-י״ה was salvation for me.” The Torah stated this as a hint, but the prophet revealed it further, saying,⁷¹Isaiah 12:2 “Behold, God, the Benevolent-E”l-א״ל is my salvation; I shall trust and not fear. For, the might and vengeance of Ya”h HaShem-י״ה יהו״ה was salvation for me.” That is, this place is not a place of fear, as there are no castigators or constraints (Meitzarim-מצרים) there. That is, Torah only said, “The might and vengeance of Ya”h-י״ה,” whereas the prophet explained the matter further. In other words, “The might and vengeance of Ya”h-י״ה,” means that when the beneficence of Ya”h-י״ה takes hold of the final two letters, in that it presently is only Ya”h-י״ה, but when they will be unified, it will be that HaShem is One-HaShem Echad-יהו״ה אחד, that is the complete salvation.