Complex sentence: Even the gods feared the Moirae or Fate, which according to Herodotus a god cannot escape, coforming to the idea that godhead was not the ultimate power, but something else behind the gods which was more powerful than they.
Split into simpler sentences: Even the gods feared the Moirae or Fate, which according to Herodotus a god couldn't escape. The ultimate power were not the gods, but something else behind the gods which was more powerful than they.