^8-10 By an act of faith, Abraham said yes to God’s call to travel to an unknown place that would become his home. When he left he had no idea where he was going. By an act of faith he lived in the country promised him, lived as a stranger camping in tents. Isaac and Jacob did the same, living under the same promise. Abraham did it by keeping his eye on an unseen city with real, eternal foundations—the City designed and built by God.

^11-12 By faith, barren Sarah was able to become pregnant, old woman as she was at the time, because she believed the One who made a promise would do what he said. That’s how it happened that from one man’s dead and shriveled loins there are now people numbering into the millions.

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^17-19 By faith, Abraham, at the time of testing, offered Isaac back to God. Acting in faith, he was as ready to return the promised son, his only son, as he had been to receive him—and this after he had already been told, “Your descendants shall come from Isaac.” Abraham figured that if God wanted to, he could raise the dead. In a sense, that’s what happened when he received Isaac back, alive from off the altar.