This endeavour, when it is toward something which causes it, is called “appetite,” or “desire”; the latter, being the general name; and the other oftentimes restrained to signify the desire of food, namely “hunger” and “thirst.” And when the endeavour is fromward something, it is generally called “aversion.” These words, “appetite” and “aversion,” we have from the Latins; and they both of them signify the motions, one of approaching, the other of retiring. So also do the Greek words for the same, which are ὁρμὴ and ἀφορμὴ . For Nature itself does often press upon men those truths, which afterwards, when they look for somewhat beyond Nature, they stumble at. For the schools find in mere appetite to go, or move, no actual motion at all: but because some motion they must acknowledge, they call it metaphorical motion; which is but an absurd speech: for though words may be called metaphorical, bodies and motions cannot.