Treasury of Scripture Knowledge
Therefore it is of faith, that it might be by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,
But people are made right with Him as a free gift by His unearned favor, through being bought back [from Satan] by Christ Jesus.
So, since we are made right with God by [our] faith, we have peace with Him through our Lord Jesus Christ.
You should know, then, that people who have faith are [truly] God's children.
restored [spiritual] life to us with Christ, even though we were [spiritually] dead because of our sins --- it is by God's unearned favor that you have been saved.
[This was] so that, being made right with God by His unearned favor, we could have the hope of [possessing our] inheritance of never ending life [in heaven].
For when God made a promise to Abraham, since He could not make a vow by anyone greater, He vowed by Himself,
2 Peter 1:10
So, brothers, be diligent to make sure of your calling and election [i.e., of your status as being selected by God], for when you do, you will never stumble [and fall away from God].
He received the sign of circumcision as a seal [confirming] that he had been [considered] righteous because of the faith he had before being circumcised. Thus, he became the [spiritual] father of all people who believe [in God], even though they have not been circumcised, so that they could be considered righteous [by their faith].
This means that it is not the physical descendants [of Abraham] who are God's children, but it is the children [born] according to [God's] promise who are [Abraham's true] descendants.
And Jesus said to him, "What is written in the law of Moses? How do you read it?"
So then, all those who have faith [in Jesus] receive a blessing along with Abraham, a man of faith.
Now, brothers, you [Christians] are children of the promise [made to Abraham. See 3:29] just like Isaac, [Abraham's son] was.