What does Galatians 3:15–25 reveal about what God the Son does in my place and on my behalf?
Jesus Christ came to obey God’s law perfectly in my place and die the death that I deserve for my sin. He came to fulfill God’s law, thereby bringing the time of the old covenant to an end. Through faith in him, his death is considered my death (punishment for my sin) and his life of perfect righteousness is imputed to me (as if it is my life of perfect righteousness).
15 Frères (je parle à la manière des hommes), un testament en bonne forme, bien que fait par un homme, n'est annulé par personne, et personne n'y ajoute.