Don’t work for the food that spoils. Work for the food that stays good always and gives eternal life. The Son of Man will give you this food, because on him God the Father has put his power.”
Abraham was circumcised to show that he was right with God through faith before he was circumcised. So Abraham is the father of all those who believe but are not circumcised; he is the father of all believers who are accepted as being right with God.
So it is with you. When you heard the true teaching—the Good News about your salvation—you believed in Christ. And in Christ, God put his special mark of ownership on you by giving you the Holy Spirit that he had promised.
And do not make the Holy Spirit sad. The Spirit is God’s proof that you belong to him. God gave you the Spirit to show that God will make you free when the final day comes.
But God’s strong foundation continues to stand. These words are written on the seal: “The Lord knows those who belong to him,” and “Everyone who wants to belong to the Lord must stop doing wrong.”
God wanted to prove that his promise was true to those who would get what he promised. And he wanted them to understand clearly that his purposes never change, so he made an oath.