one son is about the age abraham's son would have been. and he's try ing ing to imagine he would have felt. >> he was scared and very worried for his dad and knew his dad was going through a long trouble getting over the fact that he had to kill his own son, but i'm sure he understood it was coming from a higher power. >> for jews and christians too, the story of what happened next is the same, abraham's faith was absolute. he didn't argue with god. he tied up his son and laid him on the rock and then he drew his knife. >> and as the story goes, abraham literally lifts the knife before god says, abraham, abraham, you don't have to do this. >> so the son was spared, and a lamb appeared to take his place. >> one of the abiding lessons we're meant to learn from genesis is obedience to god. that if you are obedient, then in the end you are rewarded.