What is the significance of "v'Husag Achor Mishpat [u'Tzedakah me'Rachok Ta'amod]"?
Rashi: Our vengeance from our enemies, which depends on Hashem and his Tzedakah, stands afar - refer to 59:14:2:1.
Radak: This is a metaphor, as if Mishpat turned back, for it has no place among them. Similarly, "u'Tzedakah me'Rachok Ta'amod" - it does not come close to them. Mishpat is judging between two litigants, to vindicate the Tzadik and obligate the Rasha in his judgment. Tzedakah is giving to an Oni and lending to him, Chesed and fixing Midos both for poor and rich.
Radak citing Targum Yonasan: Mishpat is people who do the law. Tzedakah is doing merit.
Malbim: Mishpat is Bein Adam l'Chavero. Tzedakah is Bein Adam la'Makom. Man's nature leans towards Mishpat, for intellect mandates it. The verse depicts that it is always found among people, and now it departed. Tzedakah is not found in man's nature; he must call for it to come to him. Now, it stands afar. Mishpat goes in front of Tzedakah; if it departed, automatically Tzedakah will remain in its place, far away.
What is the significance of "Chashlah va'Rchov Emes"?
Rashi: Because Emes is weak below, Tzedek and Mishpat do not come from Shamayim.
Radak: Emes is speaking truthfully and not lying about a deposit, wages and similar matters. He does not speak with his mouth unlike his heart. The head of Emes is to admit to Kel and His Mitzvos. It says va'Rchov, for there were Anshei Emes hidden inside. So Yirmeyah said - "u'Vikshu vi'Rchovoseha Im Timtze'u Ish
What is "Nechochah"?
Radak: It is straightness. He is straight in his ways Bein Adam l'Chavero. He does not love himself more than his friend - "v'Ahavta l'Re'echa Kamocha" (Vayikra 19:18). He is straight with every person, no matter which nation he is from.
Radak citing Targum Yonasan: It is people who are trustworthy.
Malbim: This is a person who bounds his way corresponding to Hashem's way, i.e. the source of Mitzvos Bein Adam la'Makom. He must abandon his physical matters and become Kadosh, for Hashem is Kadosh. If Emes, which is in man's nature, stumbled, Tzedakah, which is not in his nature, must stand afar, for it cannot come close. Man must bring it to himself via learning and receiving.