Unless I am convinced by Scripture and plain reason – I do not accept the authority of the popes and councils, for they have contradicted each other – my conscience is captive to the Word of God. I cannot and I will not recant anything for to go against conscience is neither right nor safe. God help me. Amen.
-Martin Luther, at the Imperial Diet of Worms (1521), when pressed to recant his teachings calling for reform within the church.