What will you remember?
Rashi: Your deeds, when I do good to you.
Radak: I fulfilled the Bris, and you did not.
What will result from your shame?
Rashi: You will not lift your face to Me.
Malbim: You will see that your Kaparah is via Sedom and Shomron - their Kaparah was first, for their sins were lighter - and due to shame over your sins, you will not sin again.
What "Pischon Peh" will you not have?
Radak: You will not be able to claim against Me. Until now, you had a claim due to the length of Galus - if we sinned, we received our punishment until our hope was lost amidst the length of Galus. After I establish My Bris and atone for you, you will have no claim.
Radak citing Targum Yonasan: Your mouth will not be able to aggrandize yourself with words.
What is "b'Chaperi Lach"?
Rashi: When I pardon you.
What does the verse teach about "Kol Asher Asisi"?
Rashi: You will be ashamed, and know that all the good that I did for you was not payment for your deeds.
Sha'arei Teshuvah 1:22: When a sinner sees that Hashem passes over his sin and delays [punishment], and does not punish him according to his sin, he increases shame in his heart.