O overlight hand (as who seyth, O! feble and light is the hand of Circes the enchaunteresse, that chaungeth the bodyes of folkes in-to bestes, to regard and to comparisoun of mutacioun that is maked by vyces); ne the herbes of Circes ne ben nat mighty. For al-be-it so that they may chaungen the limes of the body, algates yit they may nat chaunge the hertes; for with-inne is y-hid the strengthe and vigor of men, in the secree tour of hir hertes; that is to seyn, the strengthe of resoun.