You cannot have power for good without having power for evil too. Even mother's milk nourishes murderers as well as heroes.
George Bernard ShawMen get tired of everything, of heaven no less than of hell; and that all history is nothing but a record of the oscillations of the world between these two extremes. An epoch is but a swing of the pendulum; and each generation thinks the world is progressing because it is always moving.
George Bernard Shaw