in these last days he has spoken to us in a son, ¹  whom he appointed heir of all things, and through whom he created the world. ² 

In the same way ¹  God wanted to demonstrate more clearly to the heirs of the promise that his purpose was unchangeable, ²  and so he intervened with an oath,

By faith Noah, when he was warned about things not yet seen, with reverent regard ¹  constructed an ark for the deliverance of his family. Through faith he condemned the world and became an heir of the righteousness that comes by faith.