No discourse whatsoever, can end in absolute knowledge of fact, past, or to come. For, as for the knowledge of fact, it is originally, sense; and ever after, memory. And for the knowledge of consequence, which I have said before is called science, it is not absolute, but conditional. No man can know by discourse, that this, or that, is, has been, or will be; which is to know absolutely: but only, that if this be, that is; if this has been, that has been; if this shall be, that shall be: which is to know conditionally; and that not the consequence of one thing to another; but of one name of a thing, to another name of the same thing. [Sidenote: Science.] And therefore, when the discourse is put into speech, and begins with the definitions of words, and proceeds by connexion of the same into general affirmations, and of these again into syllogisms; the end or last sum is called the conclusion; and the thought of the mind by it signified, is that conditional knowledge, or knowledge of the consequence of words, which is commonly called SCIENCE. [Sidenote: Opinion.] But if the first ground of such discourse, be not definitions; or if the definitions be not rightly joined together into syllogisms, then the end or conclusion, is again OPINION, namely of the truth of somewhat said, though sometimes in absurd and senseless words, without possibility of being understood. [Sidenote: Conscious.] When two, or more men, know of one and the same fact, they are said to be CONSCIOUS of it one to another; which is as much as to know it together. And because such are fittest witnesses of the facts of one another, or of a third; it was, and ever will be reputed a very evil act, for any man to speak against his _conscience_: or to corrupt or force another so to do: insomuch that the plea of conscience, has been always hearkened unto very diligently in all times. Afterwards, men made use of the same word metaphorically, for the knowledge of their own secret facts, and secret thoughts; and therefore it is rhetorically said, that the conscience is a thousand witnesses. And last of all, men, vehemently in love with their own new opinions, though never so absurd, and obstinately bent to maintain them, gave those their opinions also that reverenced name of conscience, as if they would have it seem unlawful, to change or speak against them; and so pretend to know they are true, when they know at most, but that they think so.