"He was wonderfully patient for those days and for one in his position with all kinds of creedal vagaries around him. It was only when these threatened (in his view) the foundations of morality and orderly government and therefore of society that he became severe. But (excepting in the case of Servetus) his severity limited itself to expulsion of the offender from Geneva as a disturber of the public peace, as a discordant element in the community whose continuance there might be fraught with insidious and perilous potencies of evil. Calvin in this respect accepted and applied the principle of the Justinian code, Cujus regio, ejus religio, though from a different motive, the motive not of the right of the powers-that-be to command the belief of subjects, but that of expediency in the interests of the public welfare, based as it was in his view on what he jealously regarded as the true religion."