Genesis 12:3 - Joseph Benson’s Commentary on the Old and New Testaments

In thee shall all families of the earth be blessed This promise crowned all the rest; for it pointed at the Messiah, “in whom all the promises are yea and amen.” Now, with what astonishing exactness has God fulfilled these promises, and yet how unlikely it was, at the time they were made, that they should be fulfilled! Surely we need no other proof that the historian wrote by inspiration of God!