The signs of science are some, certain and infallible; some, uncertain. Certain, when he that pretendeth[pretendeth] the science of any thing, can teach the same; that is to say, demonstrate the truth thereof perspicuously to another; uncertain, when only some particular events answer to his pretence, and upon many occasions prove so as he says they must. Signs of prudence are all uncertain; because to observe by experience, and remember all circumstances that may alter the success, is impossible. But in any business, whereof a man has not infallible science to proceed by; to forsake his own natural judgment, and be guided by general sentences read in authors, and subject to many exceptions, is a sign of folly, and generally scorned by the name of pedantry. And even of those men themselves, that in councils of the commonwealth love to show their reading of politics and history, very few do it in their domestic affairs, where their particular interest is concerned; having prudence enough for their private affairs: but in public they study more the reputation of their own wit, than the success of another’s business.
CHAPTER VI.
OF THE INTERIOR BEGINNINGS OF VOLUNTARY MOTIONS; COMMONLY CALLED THE PASSIONS; AND THE SPEECHES BY WHICH THEY ARE EXPRESSED.
Motion, vital and animal.
There be in animals, two sorts of motions peculiar to them: one called vital; begun in generation, and continued without interruption through their whole life; such as are the course of the blood, the pulse, the breathing, the concoction, nutrition, excretion, &c. to which motions there needs no help of imagination: the other is animal motion, otherwise called voluntary motion; as to go, to speak, to move any of our limbs, in such manner as is first fancied in our minds. That sense is motion in the organs and interior parts of man’s body, caused by the action of the things we see, hear, &c.; and that fancy is but the relics of the same motion, remaining after sense, has been already said in the [first] and [second] chapters. And because going, speaking, and the like voluntary motions, depend always upon a precedent thought of whither, which way, and what; it is evident, that the imagination is the first internal beginning of all voluntary motion. And although unstudied men do not conceive any motion at all to be there, where the thing moved is invisible; or the space it is moved in is, for the shortness of it, insensible; yet that doth not hinder, but that such motions are. For let a space be never so little, that which is moved over a greater space, whereof that little one is part, must first be moved over that. |Endeavour.| These small beginnings of motion, within the body of man, before they appear in walking, speaking, striking, and other visible actions, are commonly called ENDEAVOUR.
Appetite. Desire.
This endeavour, when it is toward something which causes it, is called APPETITE, or DESIRE; the latter, being the general name; |Hunger. Thirst.| and the other oftentimes restrained to signify the desire of food, namely hunger and thirst. |Aversion.| 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 can not.
Love. Hate.
That which men desire, they are also said to LOVE: and to HATE those things for which they have aversion. So that desire and love are the same thing; save that by desire, we always signify the absence of the object; by love, most commonly the presence of the same. So also by aversion, we signify the absence; and by hate, the presence of the object.