18. The great gift that God has for us does not depend on the law. If it did, it would no longer depend on a promise. But God gave it to Abraham as a free gift through a promise.
19. Then what was the purpose of the law? It was added because of human sin. And it was supposed to control us until the promised Seed had come. The law was put into effect through angels by a go-between.
20. A go-between does not take sides. God didn't use a go-between when he made his promise to Abraham. But the same God was at work in both the law and the promise.