For this reason Christ did not wield the sword nor give it a place in His kingdom; for He is King over Christians and rules by His Holy Spirit alone, without law. And although He acknowledged the sword, He nevertheless did not use it; for it is of no use in His kingdom, in which are none but the pious. Hence David of old dared not build the temple, because he had shed much blood and had borne the sword; not that he had done wrong thereby, but because he could not be a type of Christ, who without the sword was to have a kingdom of peace. It must be built by Solomon… All for this reason, that Christ, without constraint and force, without law and the sword, was to have a people who serve Him freely.
— Martin Luther