As usurpation is the exercise of power which another has a right to, so tyranny is the exercise of power beyond right, which nobody can have a right to.
John LockeIt is vain to find fault with those arts of deceiving wherein men find pleasure to be deceived.
John LockeYou shall find, that there cannot be a greater spur to the attaining what you would have the eldest learn, and know himself, than to set him upon teaching it his younger brothers and sisters.
John Locke