The key word here, as you put it, seems to be "faith;" "faith in the future greater good that requires unfathomable amounts of senseless evil." Or, if evil is really required, one might wonder if it's actually senseless, and in that case, truly evil. At any rate, Christians, as with most theists, often remind me of a great line from Geothe's Faust:
"Where concepts fail, a word conveniently puts itself in their place at just the right time."
"Where concepts fail, a word conveniently puts itself in their place at just the right time."
He who loves God cannot endeavour that God should love him in return - Baruch Spinoza
