Words are too awful an instrument (Wordsworth)

Words are too awful an instrument for good and evil to be trifled with: they hold above all other external powers a dominion over thoughts. If words be not (recurring to a metaphor before used) an incarnation of the thought but only a clothing for it, then surely will they prove an ill gift; such a one as those poisoned vestments, read of in the stories of superstitious times, which had power to consume and to alienate from his right mind the victim who put them on. Language, if it do not uphold, and feed, and leave in quiet, like the power of gravitation or the air we breathe, is a counter-spirit, unremittingly and noiselessly at work to derange, to subvert, to lay waste, to vitiate, and to dissolve.

William Wordsworth, Essays Upon Epitaphs III