The Greeks, with their truly healthy culture, have once and for all justified philosophy simply by having engaged in it, and having engaged in it more fully than any other people.
There is a great ladder of religious cruelty, and, of its many rungs, three are the most important. People used to make human sacrifices to their god, perhaps even sacrificing those they loved the best ... Then, during the moral epoch of humanity, people sacrificed the strongest instincts they had, their 'nature,' to their god... Finally: what was left to be sacrificed? ... Didn't people have to sacrifice God himself and worship rocks, stupidity, gravity, fate, or nothingness out of sheer cruelty to themselves?
The noble caste was in the beginning always the barbarian caste: their superiority lay, not in their physical strength, but primarily in their psychical - they were more complete human beings.