that they are heavy, light, transparent, great and little, senseless and dead (as shall be showed more at large, in our [1615] sections of symptoms), can be imputed to nought else, but to a corrupt, false, and violent imagination. It works not in sick and melancholy men only, but even most forcibly sometimes in such as are sound: it makes them suddenly sick, and [1616]alters their temperature in an instant. And sometimes a strong conceit or apprehension, as [1617]Valesius proves, will take away diseases: in both kinds it will produce real effects. Men, if they see but another man tremble, giddy or sick of some fearful disease, their apprehension and fear is so strong in this kind, that they will have the same disease. Or if by some soothsayer, wiseman, fortune-teller, or physician, they be told they shall have such a disease, they will so seriously apprehend it, that they will instantly labour of it. A thing familiar in China (saith Riccius the Jesuit), [1618]If it be told them they shall be sick on such a day, when that day comes they will surely be sick, and will be so terribly afflicted, that sometimes they die upon it. Dr. Cotta in his discovery of ignorant practitioners of physic, cap. 8, hath two strange stories to this purpose, what fancy is able to do. The one of a parson's wife in Northamptonshire, _An._ 1607, that coming to a physician, and told by him that she was troubled with the sciatica, as he conjectured (a disease she was free from), the same night after her return, upon his words, fell into a grievous fit of a sciatica: and such another example he hath of another good wife, that was so troubled with the cramp, after the same manner she came by it, because her physician did but name it. Sometimes death itself is caused by force of phantasy. I have heard of one that coming by chance in company of him that was thought to be sick of the plague (which was not so) fell down suddenly dead. Another was sick of the plague with conceit. One seeing his fellow let blood falls down in a swoon. Another (saith [1619]Cardan out of Aristotle), fell down dead (which is familiar to women at any ghastly sight), seeing but a man hanged. A Jew in France (saith [1620]Lodovicus Vives), came by chance over a dangerous passage or plank, that lay over a brook in the dark, without harm, the next day perceiving what danger he was in, fell down dead. Many will not believe such stories to be true, but laugh commonly, and deride when they hear of them; but let these men consider with themselves, as [1621]Peter Byarus illustrates it, If they were set to walk upon a plank on high, they would be giddy, upon which they dare securely walk upon the ground. Many (saith Agrippa), [1622]strong-hearted men otherwise, tremble at such sights, dazzle, and are sick, if they look but down from a high place, and what moves them but conceit? As some are so molested by phantasy; so some again, by fancy alone, and a good conceit, are as easily recovered. We