It is not without good reason said "that he who has not a good memory should never take upon him the trade of lying." I know very well that the grammarians --[Nigidius, Aulus Gellius, xi. ii; Nonius, v. 80.]--distinguish betwixt an untruth and a lie, and say that to tell an untruth is to tell a thing that is false, but that we ourselves believe to be true; and that the definition of the word to lie in Latin, from which our French is taken, is to tell a thing which we know in our conscience to be untrue; and it is of this last sort of liars only that I now speak. Now, these do either wholly contrive and invent the untruths they utter, or so alter and disguise a true story that it ends in a lie. When they disguise and often alter the same story, according to their own fancy, 'tis very hard for them, at one time or another, to escape being trapped, by reason that the real truth of the thing, having first taken possession of the memory, and being there lodged impressed by the medium of knowledge and science, it will be difficult that it should not represent itself to the imagination, and shoulder out falsehood, which cannot there have so sure and settled footing as the other; and the circumstances of the first true knowledge evermore running in their minds, will be apt to make them forget those that are illegitimate, and only, forged by their own fancy. In what they, wholly invent, forasmuch as there is no contrary impression to jostle their invention there seems to be less danger of tripping; and yet even this by reason it is a vain body and without any hold, is very apt to escape the memory, if it be not well assured. Of which I had very pleasant experience, at the expense of such as profess only to form and accommodate their speech to the affair they have in hand, or to humour of the great folks to whom they are speaking; for the circumstances to which these men stick not to enslave their faith and conscience being subject to several changes, their language must vary accordingly: whence it happens that of the same thing they tell one man that it is this, and another that it is that, giving it several colours; which men, if they once come to confer notes, and find out the cheat, what becomes of this fine art? To which may be added, that they must of necessity very often ridiculously trap themselves; for what memory can be sufficient to retain so many different shapes as they have forged upon one and the same subject? I have known many in my time very ambitious of the repute of this fine wit; but they do not see that if they have the reputation of it, the effect can no longer be.
In plain truth, lying is an accursed vice. We are not men, nor have other tie upon one another, but by our word. If we did but discover the horror and gravity of it, we should pursue it with fire and sword, and more justly than other crimes. I see that parents commonly, and with indiscretion enough, correct their children for little innocent faults, and torment them for wanton tricks, that have neither impression nor consequence; whereas, in my opinion, lying only, and, which is of something a lower form, obstinacy, are the faults which are to be severely whipped out of them, both in their infancy and in their progress, otherwise they grow up and increase with them; and after a tongue has once got the knack of lying, 'tis not to be imagined how impossible it is to reclaim it whence it comes to pass that we see some, who are otherwise very honest men, so subject and enslaved to this vice.