As Abraham’s faith in God was counted to him for righteousness, so your faith in Jesus was counted to you. You know, then, that they who cleave to the rule of Faith, inherit Abraham’s Faith, and are his sons (for he that inherits is a son). The idea that they who follow the principle of Faith are sons of Abraham, whatever family they belonged to by nature, would certainly be understood by the Galatians as referring to the legal process called Adoption, υἱοθεσία. Now
Page 337