What is the meaning of "Tzidkasecha Tzedek l'Olam"?
Rashi (141): In [Your Pikudim] is Tzedek and eternal Emes. Even though afflictions found me, [Pikudecha] were always my engagement. Make me understand their virtue, and I will live in them - "Ki Hi Chayecha v'Orech Yamecha" (Devarim 30:20).
Radak: Your Tzedakah with the world is forever.
Malbim: Regarding Hashem, Tzedakah teaches about His acts based on supreme Tzedakah, without looking at people's deeds and merits. Also this conduct, which is close to Chesed, is Tzedek l'Olam. Hashem conducts like this when needed for the Klal of the world, e.g. with the Avos, kings of Beis David and Klal Yisrael, when His Chachmah sees that it will fix the world.
What do we learn from "v'Sorasecha Emes"?
Radak: All the Torah's Mitzvos are Emes. The straight Mishpatim sustain the world; through them, people can coexist. Also the promises that the Torah made for one who guards the Torah are true; they are not false.
Malbim: We already find this in the Torah, in telling the conduct of generations from the beginning to the end. E.g. at Yetzi'as Egypt and Matan Torah, Hashem acted with more Tzedakah to be a path of perfection for the entire creation.
