There's an (in)famous Psalm about this. People who were never
   Christian (or Jewish I suppose) before or never understood it if
   they were, misinterpret it all of the time. It's EXACTLY about
   this: "9Blessed shall he be who shall seize and dash thine
   infants against the rock." and variations of it. From the
   earliest readings of it, "the infants" or "the children" being
   dashed against the rock refers to killing wicked thoughts just
   as they emerge. Not bad for 2500 yr old psychology.