Romans 4:1-12, 16

What then shall we say that Abraham, our forefather humanly speaking, has found? [Has he obtained a favored standing?] For if Abraham was justified [that is, acquitted from the guilt of his sins] by works [those things he did that were good], he has something to boast about, but not before God. For what does the Scripture say? “ABRAHAM BELIEVED IN (trusted, relied on) GOD, AND IT WAS CREDITED TO HIS ACCOUNT AS RIGHTEOUSNESS (right living, right standing with God).” [Gen 15:6] Now to a laborer, his wages are not credited as a favor or a gift, but as an obligation [something owed to him]. But to the one who does not work [that is, the one who does not try to earn his salvation by doing good], but believes and completely trusts in Him who justifies the ungodly, his faith is credited to him as righteousness (right standing with God). And in this same way David speaks of the blessing on the one to whom God credits righteousness apart from works: “BLESSED and HAPPY and FAVORED ARE THOSE WHOSE LAWLESS ACTS HAVE BEEN FORGIVEN, AND WHOSE SINS HAVE BEEN COVERED UP and COMPLETELY BURIED. “BLESSED and HAPPY and FAVORED IS THE MAN WHOSE SIN THE LORD WILL NOT TAKE INTO ACCOUNT nor CHARGE AGAINST HIM.” [Ps 32:1, 2] Is this blessing only for the circumcised, or also for the uncircumcised? For we say, “FAITH WAS CREDITED TO ABRAHAM AS RIGHTEOUSNESS.” How then was it credited [to him]? Was it after he had been circumcised, or before? Not after, but while [he was] uncircumcised. He received the sign of circumcision, a seal or confirmation of the righteousness which he had by faith while [he was still] uncircumcised—this was so that he would be the [spiritual] father of all who believe without being circumcised—so that righteousness would be credited to them, and [that he would be] the [spiritual] father of those circumcised who are not only circumcised, but who also walk in the steps of the faith of our father Abraham which he had before he was circumcised.

Therefore, [inheriting] the promise depends entirely on faith [that is, confident trust in the unseen God], in order that it may be given as an act of grace [His unmerited favor and mercy], so that the promise will be [legally] guaranteed to all the descendants [of Abraham]—not only for those [Jewish believers] who keep the Law, but also for those [Gentile believers] who share the faith of Abraham, who is the [spiritual] father of us all