Adon Haselichos

The most heart-rending part is at the very end. The song is written in Hebrew acrostic, in sets of four, and is a list of praises of G-d. So, "Poel Yeshuos, Tzofeh Atidos, Korei Hadoros, Rochev Aravos (Doer of wonders, Forseer of future things, Who calls out unto each generation, Keeper of promises)."
Then, at the last two stanzas, the song turns happy for a few seconds. "Shomea Tefilos, Temim Deos (Hearer of prayers, Perfect in knowledge)."
As if the singer in his pained entreaty has a moment where he feels hope, his pain so great his cry is expressed as laughter, delirious joy, his apology turning into a musing, musing that maybe his entreaty was heard, nothing else fits in his mind. The words break the mold, they give him a promise that at least he was heard, unstable, unnatural to the pattern -
then they come crashing down, the instability, back into reality, into vociferous sobbing, saying, crying out loud, "Who is this, and where is He? This is my G-d and I shall adorn Him!" Reply

off-the-cuff translation

Lord of forgivenesses, prober of hearts:
You are revealing depths, spreading the influence of the command for just charity. (sorry, דובר is hard to translate...basically the non-pi'el form of "command".)

Who is this, and of what sort? This is my G-d and I will follow him

Splendorous in miracles, veteran in consolations
mentioner of the covenant of fathers, searcher of consciences

Who is this, and of what sort? This is my G-d and I will follow him

Good, and bestowing good to the creations; knower of all hidden things,
conquerer of guilt, dresser of just charity

Who is this, and of what sort? This is my G-d and I will follow him

filled with merit, wondrous in praises
forgiver of guilt, he is answering in a time of distress

Doer of salvations, perceiver of futures;
Caller of gatherings, [phrase I don't even think to understand];


"He listens to the requests of whole-hearted knowledges

Who is this, and of what sort? This is my G-d and I will follow him. Reply

Where would I find a translation? Is this in the Chabad Siddur anywhere? Reply

Hebrew text for this piyut אֲדוֹן הַסְּלִיחוֹת בּוֹחֵן לְבָבוֹת
גּוֹלֶה עֲמוּקוֹת דּוֹבֵר צְדָקוֹת

מי הוא זה ואיזהו זה א-לי ואנוהו

הָדוּר בְּנִפְלָאוֹת וָתִיק בְּנֶחָמוֹת
זוֹכֵר בְּרִית אָבוֹת חוֹקֵר כְּלָיוֹת

מי הוא זה ואיזהו זה א-לי ואנוהו

טוֹב וּמֵטִיב לַבְּרִיּוֹת יוֹדֵעַ כָּל נִסְתָּרוֹת
כּוֹבֵשׁ עֲוֹנוֹת לוֹבֵשׁ צְדָקוֹת

מי הוא זה ואיזהו זה א-לי ואנוהו

מָלֵא זְכִיּוֹת נוֹרָא תְהִלּוֹת
סוֹלֵחַ עֲוֹנוֹת עוֹנֶה בְּעֵת צָרוֹת

מי הוא זה ואיזהו זה א-לי ואנוהו

פּוֹעֵל יְשׁוּעוֹת צוֹפֶה עֲתִידוֹת
קוֹרֵא הַדּוֹרוֹת רוֹכֵב עֲרָבוֹת

שׁוֹמֵעַ תְּפִלּוֹת תָּמִים דֵּעוֹת
מי הוא זה ואיזהו זה א-לי ואנוהו

מי הוא זה ואיזהו זה א-לי ואנוהו Reply