And if ye be Christ’s, then are ye Abraham’s seed, and heirs according to the promise [Gal. 3:29].
"How can we be Abraham’s descendants? Because of the fact that Abraham was saved by faith, and we are saved by faith. Abraham brought a little animal to sacrifice, which looked forward to the coming of the Son of God, the supreme sacrifice. In my day, Christ has already come, and I can look back in history and say, “Nineteen hundred years ago the Son of God came and died on the cross for me that I might have life, and I trust Him.” Some time ago I had the privilege of speaking to a group of wonderful Jewish folk, and I started by saying, “Well, it is always a privilege for me to speak to the sons of Abraham.” And they all smiled. Then I added, “Because I am a son of Abraham, too.” They didn’t all smile at that. In fact, some of them had a question mark on their faces, and rightly so. If I am in Christ and you are in Christ, then we belong to Abraham’s seed, and we are heirs according to the promise. How wonderful this is!" McGee, J. V. (1997). Thru the Bible commentary (electronic ed., Vol. 5, p. 174). Nashville: Thomas Nelson.