In demonstration, in counsel, and all rigorous search of truth, judgment does all, except sometimes the understanding have need to be opened by some apt similitude; and then there is so much use of fancy. But for metaphors, they are in this case utterly excluded. For seeing they openly profess deceit; to admit them into counsel or reasoning were manifest folly.

And in any discourse whatsoever, if the defect of discretion be apparent, how extravagant soever the fancy be, the whole discourse will be taken for a sign of want of wit; and so will it never when the discretion is manifest, though the fancy be never so ordinary.