”We, therefore, conclude that the civil government, as soon as it discovers abominable heresies by which the glory of Christ is diminished and the salvation of souls prevented, is in duty bound, yea that it has the office, to wield the sword and to exercise its full authority against those errors which bring divisions among the people and other great calamities, as we have experienced more than once. And if the teachers of false doctrines will not be convinced of their error, nor desist from their preaching, let the government use its power and compel them to refrain from their mischievous work, so that the true doctrine, and the proper worship of God, may be retained pure and unadulterated, that peace and harmony may prevail.”
Martin Luther
Sermons on the Gospel; Fifth Sunday After Epiphany
“The Lord does not give Kings the right to use their power to subject the people to tyranny. Indeed when Liberty to resist tyranny seems to be taken away by princes who have taken over, one can justly ask this question; since kings and princes are bound by covenant to the people, to administer law in truest equality, sincerity, and integrity; if they break faith and usurp tyrannical power by which they allow themselves everything they want: is it not possible for the people to consider together taking measures in order to remedy the evil?”
John Calvin
Sermon on 1 Samuel 8