Αὐθαδία γὰρ τῷ φρονοῦντι μὴ καλῶς αὐτὴ καθ' αὑτὴν οὐδενὸς μεῖζον σθένει. - Aeschylus

But the lust for power never dies- men cannot have enough.
No one will lift a hand to send it from his door, to give it warning, 'Power, never come again!

Learning comes through pain.

...that we must suffer, suffer into truth. We cannot sleep, and drop by drop at the heart the pain of pain remembered comes again and we resist, but ripeness comes as well. From the gods enthroned on the awesome rowing-bench there comes a violent love.