WHOEVER has an opinion of his own, and honestly expresses it, will be guilty of heresy. Heresy is what the minority believe; it is the name given by the powerful to the doctrine of the weak. This word was born of the hatred, arrogance and cruelty of those who love their enemies, and who, when smitten on one cheek, turn the other. This word was born of intellectual slavery in the feudal ages of thought. It was an epithet used in the place of argument.
Robert Green Ingersoll – “Heretics and Hericies”(1874)