Galatians 3:4-9
4 Have you suffered so much for nothing? If that’s the way you think, your suffering certainly will have been for nothing!
5 What about God, who supplies you with the Spirit and works miracles among you — does he do it because of your legalistic observance of Torah commands or because you trust in what you heard and are faithful to it?
6 It was the same with Avraham: “He trusted in God and was faithful to him, and that was credited to his account as righteousness.”
7 Be assured, then, that it is those who live by trusting and being faithful who are really children of Avraham.
8 Also the Tanakh, foreseeing that God would consider the Gentiles righteous when they live by trusting and being faithful, told the Good News to Avraham in advance by saying, “In connection with you, all the Goyim will be blessed.”
9 So then, those who rely on trusting and being faithful are blessed along with Avraham, who trusted and was faithful.
Yes being born again into the spiritual family of Abraham. Everyone from Adam until the last human born, can be equal in righteousness to Abraham. It is nothing about Abraham's physical seed, other than one in particular. Jesus Christ fully God, and fully man. The only Atonement God would accept as worthy of Salvation. It is trusting and obeying that God considers righteous. It is not even works, spiritual or fleshly. It is only the power of God that brings Salvation.
That was Paul's response to those in Christ who thought suffering was too much in this lifetime.