But dikaioo is a legal term meaning to declare just in court, so it’s logical to picture a judge there at the moment of justification. I’d like to understand better the point that to be just is to be his son and vice versa… if justification is about sonship, then why did Paul bother use such legal language as justification why not just talk about filiation…?
He never spoke of a courtroom, he never mentioned a judge…however he did talk about filiation, quite powerfully.
Romans 4 (esp 11-17) drives home the fact Abraham is “the father of us all” through faith.
26You are all
sons of God through faith in Christ Jesus, 27for all of you who were baptized into Christ have clothed yourselves with Christ. 28There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus. 29If you belong to Christ, then you are
Abraham’s seed, and heirs according to the promise. 1What I am saying is that as long as the heir is a child, he is no different from a slave, although he owns the whole estate. 2He is subject to guardians and trustees until the time set by his father. 3So also, when we were children, we were in slavery under the basic principles of the world. 4But when the time had fully come, God sent his Son, born of a woman, born under law, 5to redeem those under law, that
we might receive the full rights of sons. 6Because you are sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.” 7So you are no longer a slave, but a son; and since you are a son, God has made you also an heir.-Gal 3, 4
The idea that we are “sons”, “heirs”, etc is all over the New Testament.
As to behavioral righteousness, if that’s what it’s all about, then why are the sacraments and faith in Jesus’ atonement necessary?
Behavioral righteousness in the Bible means that person cooperated with the grace God gave them, they understood the point of the commandments, Rom 13:9f.
If Old covenant people could be righteous by obeying the commandments, why was a change needed? Obviously God could view Zacharias and his wife and the OT patriarchs from the point of view of grace and not law since they also sinned to be sure… ok now you’ll say this was thanks to Christ’s atonement that God foresaw… ok… but then I’m confused why God gave the system of law in the first place…st. Paul says the Law served as a tutor to bring us to Christ, to reveal sin… but that worked only for the Christians who had lived under the law, it doesn’t work for us since we never had to obey the Mosaic law, and it didn’t work for the OT people since they never saw the day of Christ… confuuused.
One huge problem with the Protestant position is they think salvation came by obeying the Law perfectly…that is incorrect. Salvation came by becoming an adopted son of God, and that does require a change by grace through faith (Eph 2:8), all of Heb 11 shows this to be the case since the days of Abel. The Law did multiple things, it showed what God expects from man (Rom 13:9f), prefigured the sacrifice of Christ as High Priest and Lamb (Heb 10:1-10), and which was eventually fulfilled in Jesus (eg Mat 5:17f, 5:21ff, 19:3-9).