15. Brothers and sisters, let me give you an example from everyday life: Think about an agreement that one person makes with another. After that agreement is made official, no one can stop it or add anything to it, and no one can ignore it.
16. God made promises to Abraham and his Descendant. The Scripture does not say, “and to your descendants.” That would mean many people. But it says, “and to your Descendant.” That means only one, and that one is Christ.
17. This is what I mean: The agreement that God gave to Abraham was made official long before the law came. The law came 430 years later. So the law could not take away the agreement and change God’s promise.
18. Can following the law give us the blessing God promised? If we could receive it by following the law, then it would not be God’s promise that brings it to us. But God freely gave his blessings to Abraham through the promise God made.
19. So what was the law for? The law was given to show the wrong things people do. The law would continue until the special Descendant of Abraham came. This is the Descendant mentioned in the promise, which came directly from God. But the law was given through angels, and the angels used Moses as a mediator to give the law to the people.