OF A SENTENCE.
A sentence is an universal proposition concerning those things which are to be desired or avoided in the actions or passions of the common life. As, A wise man will not suffer his children to be over-learned. And is to an enthymeme in rhetoric, as any proposition is to a syllogism in logic. And therefore a sentence, if the reason be rendered, becomes a conclusion; and both together make an enthymeme. As for example: To be over-learned, besides that it begets effeminacy, procures envy. Therefore he that is wise will not suffer his children to be over-learned.
Of sentences there be four sorts. For they either require proofs or not, that is, are manifest or not.
Such as are manifest, are either so as soon as they are uttered; as, Health is a great good. Or as soon as they are considered; as, Men use to hate whom they have hurt.
Such as are not manifest, are either conclusions of enthymemes; as, He that is wise will not suffer his children, &c. Or else are enthymematical; that is, have in themselves the force of an enthymeme; as Mortal men ought not to carry immortal anger.
A sentence not manifest, ought to be either inferred or confirmed. Inferred thus: It is not good to be effeminately minded, nor to be envied by one’s fellow-citizens. A wise man, therefore, will not have his children over-learned. Confirmed thus: A wise man will not have his children over-learned; seeing too much learning both softens a man’s mind, and procures him envy among his fellow-citizens.
If a reason be added to a manifest sentence, let it be short.
Sentences become not every man; but only old men, and such as be well-versed in business. For to hear a young man speak sentences, is ridiculous; and to hear an ignorant man speak sentences, is absurd.
Sentences generally received, when they are for our purpose, ought not to be neglected; because they pass for truths. And yet they may be denied, when any laudable custom or humour may thereby be made appear in the denier.
The commodities of sentences, are two. One proceeding from the vanity of the hearer, who takes for true universally affirmed, that which he has found for true only in some particular; and therefore a man ought to consider in every thing what opinion the hearer holds. Another is, that sentences do discover the manners and disposition of the speaker; so that if they be esteemed good sentences, he shall be esteemed a good man; and if evil, an evil man.
Thus much of sentences, what they be; of how many sorts; how to be used; whom they become; and what is their profit.
==========
The English Works of Thomas Hobbes of Malmesbury, Volume 06 (of 11) · The Wunder Library — complete classics, free to read, with narration.