XVII. 1. Where the purpose of putting an end to the practice may be attained as effectually at a cheaper rate: by instruction, is for instance, as well as by terror: by informing the understanding, as well as by exercising an immediate influence on the will. This seems to be the case with respect to all those offenses which consist in the disseminating pernicious principles in matters of duty; of whatever kind the duty be; whether political, or moral, or religious. And this, whether such principles be disseminated under, or even without; a sincere persuasion of their being beneficial. I say, even without: for though in such a case it is not instruction that can prevent the writer from endeavouring to inculcate his principles, yet it may the readers from adopting them: without which, his endeavouring to inculcate them will do no harm. In such a case, the sovereign will commonly have little need to take an active part: if it be the interest of one individual to inculcate principles that are pernicious, it will as surely be the interest of other individuals to expose them. But if the sovereign must needs take a part in the controversy, the pen is the proper weapon to combat error with, not the sword.