I am not permitted to let my love be so merciful as to tolerate and endure false doctrine. When faith and doctrine are concerned and endangered, neither love nor patience are in order....when these are concerned, neither toleration nor mercy are in order, but only anger, dispute, and destruction - to be sure, only with the Word of God as our weapon.
Martin LutherOnce sure that the doctrine we teach is God's Word, once certain of this, we may build thereupon, and know that this cause shall and must remain; the devil shall not be able to overthrow it, much less the world be able to uproot it, how fiercely soever it rage.
Martin Luther