saying, “I will surely bless you and multiply you.” And thus Abraham, having patiently endured, obtained the promise. Human beings, of course, swear by someone greater than themselves, and an oath given as confirmation puts an end to all dispute. In the same way, when God desired to show even more clearly to the heirs of the promise the unchangeable character of his purpose, he guaranteed it by an oath, so that through two unchangeable things, in which it is impossible that God would prove...