Well I’m pretty convinced of some aspects of what are term the ‘New Perspective’ on Paul, explained in brief summary here:
thepaulpage.com/the-shape-of-justification/
And in light of that this is how God’s deals with the problem and His faithfulness to His covenant and His people in light of the affliction of death (where dikaiosuné often translated righteousness has a wide meaning of covenant-faithfulness, mercy and loving-kindness, justice and so on, and has the faithfulness of God in particular view) by the faithfulness of the Messiah who represents and is Israel (after His resurrection He opened the Scriptures and explained to the disciples everything through the OT that referred to Him, or as the ancient creed Paul sites put it’s ‘Christ died according to the Scriptures’ the whole Scriptures not just some prophecies, it is all about Him) fulfills the call to faithfulness and to complete to renewed call of Adam to in Abraham to become fully human (with Christ taking and sharing our humanity Christ takes on our humanity and completes through our brokenness the call and project of humanity to become the image and likeness of God, so Pilate announces ‘behold the man’) and as the just one is the one who sharking our death to ransoms us from the power of death and brings through the cross and resurrection the promised forgiveness of sins and release from death and return from exile and into life (and resurrection to come). And our faith and faithfulness into the Messiah and to Him (and the marks of baptism and the eucharist for Paul as a regular practice at least) is what justifies us, that is marks us out as being in Christ, and one of God’s covenant people rather than the works of Torah (circumcision, food-laws, certain feasts etc), those markers that had marked Jew from Gentile (to both pagans and Jews) did not really make someone out as a true covenant member of Abraham’s family, but only faith into and faithfulness to the Messiah and the grace of God and the ransom from death found in Him.