The preaching of the Gospel to Abraham was the proof that God would justify the heathen through faith; for Abraham was born a heathen. “The father of Abraham and the father of Nachor” “served other gods.” Joshua 24:2.
The very existence of the Jewish nation, therefore, and their separation from the nations of earth, was a standing witness to the fact that it was God's plan to save as many heathen as would believe."
Sabbath School Lesson 1900