Abraham and his descendants received the promise that they would get the whole world. He did not receive that promise through the law, but through being right with God by his faith.
Your descendants will be as many as the dust of the earth. They will spread west and east, north and south, and all the families of the earth will be blessed through you and your descendants.
Kings will come from Judah’s family; someone from Judah will always be on the throne. Judah will rule until Shiloh comes, and the nations will obey him.
And Abraham is also the father of those who have been circumcised and who live following the faith that our father Abraham had before he was circumcised.
This means that not all of Abraham’s descendants are God’s true children. Abraham’s true children are those who become God’s children because of the promise God made to Abraham.
It was by faith that Noah heard God’s warnings about things he could not yet see. He obeyed God and built a large boat to save his family. By his faith, Noah showed that the world was wrong, and he became one of those who are made right with God through faith.