Why does it say "Za'af Hashem Esa"?
Radak: In my Galus, I bear and suffer His anger.
Radak citing Targum Yonasan: I received a curse from Hashem.
Malbim: Via this falling, I bear His anger. This cleanses my sins and atones.
What do we learn from "Ki Chatasi Lo"?
Radak: I justify the judgment against me.
What is the meaning of "Yariv Rivi v'Asah Mishpati"?
Radak: He will wage my battle with the nations that pressured me, and take my vengeance against them.
Malbim: At the time of the Ge'ulah, He will judge those who pain and pressure me.
How will I see "Tzidkaso"?
Radak: He will do more Tzedakah with me.
Malbim: Until that time, the light from His virtue is found, just I sit in darkness and my eyes are closed from seeing it. Then, He will take me out to light, and I will see His light and salvation. Then, I will understand retroactively the Tzedakah that He did with me ? it was all Tzedakah and Chesed for my good.