" Sol wanted to know how any ethical system – much less a religion so indomitable that it had survived every evil mankind could throw at it – could flow from a command from God for a man to slaughter his son. It did not matter to Sol that the command had been rescinded at the last moment. It did not matter that the command was a test of obedience. In fact, the idea that it was the obedience of Abraham which allowed him to become the father of all the tribes of Israel was precisely what drove Sol into fits of fury. "

― Dan Simmons , Hyperion (Hyperion Cantos, #1)