To the rulers of the state then, if to any, it belongs of right to use falsehood, to deceive either enemies or their own citizens, for the good of the state: and no one else may meddle with this privilege.
PlatoIt is as expedient that a wicked man be punished as that a sick man be cured by a physician; for all chastisement is a kind of medicine.
PlatoThat which is apprehended by intelligence and reason is always in the same state; but that which is conceived by opinion with the help of sensation and without reason, is always in a process of becoming and perishing and never really is.
Plato