LETTERS. =LETTER= I. Since you request that our correspondence should be out of the beaten track, be it so. My retirement from the world will naturally give an air of peculiarity to my sentiments, which perhaps may entertain where it does not convince. In justice to myself, let me observe, that truth sometimes does not strike us without the assistance of custom; but so great is the force of custom, that, unassisted by truth, it has worked the greatest miracles. Need I bring for proof the quantity of nonsense in all the arts, sciences, and even religion itself, which it has sanctified? As possibly in the course of my letters to you I may attack some received doctrines on each of these subjects, let not what I advance be instantly rejected, because contrary to an opinion founded on prejudice; but, as much as possible, divest yourself of the partiality acquired by habit, and if at last you should not agree with me, I shall suspect my sentiments to be peculiar and not just. Tho’ truth may want the assistance of use before we feel its force, yet when it is really felt, we detest what custom only made us like. The difficulty is to procure for truth a fair examination. The multitude is always against it. The first discovery in any thing is considered as an encroachment upon property, a property become sacred by possession. Discoverers are accordingly treated as criminals, and must have good luck to escape execution. I mean not to rank myself with such bold adventurers; I am neither ambitious of the honour, or the danger, of enlightening the world, but, if I can soften prejudices which I cannot remove—if I can loosen the fetters of custom where I cannot altogether unbind them, and engage you to think for yourself—my end will be answered, and my trouble fully repaid. Adieu! &c. =LETTER= II. It is natural to suppose, that people originally judged of things by their senses and immediate perceptions. By degrees they found that their senses were not infallible, and that things frequently contradicted their first appearance. This, at last, was pushed to an extravagance; and certain philosophers endeavoured to persuade mankind, that the senses deceive us so often, that we can never depend on them—that we cannot tell whether we are in motion or at rest, asleep or awake, with many other such absurdities. They used the same ingenuity with the mental sense. Some ancient sage was asked, “Who is the richest man?” if he had replied “He that has most money,” the answer would have been natural and just—what he did say, every one knows. We have suffered ourselves to be imposed on so long, that at last we begin to impose on ourselves.