As those we have been speaking of are hindred in their search after Truth, thro a want of Ideas out of which to deduce it, so there are another sort who are not happy in their Enquiries, on account of the multitude and Impetuosity of theirs. Volatileness of Thought, very pernicious to true Science, is a fault which People of warm Imaginations and Active Spirits are apt to fall into. Such a Temper is readily dispos’d to receive Errors and very well qualified to propagate them, especially if a volubility of Speech be join’d to it. These thro an immoderate nimbleness of Thinking skip from one Idea to another, without observing due Order and Connexion, they content themselves with a superficial view, a random glance, and depending on the vigor of their Imagination, are took with Appearances, never tarrying to penetrate the Subject, or to find out Truth if she float not upon the Surface. A multitude of Ideas not relating to the matter they design to think of rush in upon them, and their easie Mind entertains all comers how impertinent soever; instead of examining the Question in debate they are got into the Clouds, numbring the Cities in the Moon and building Airy Castles there. Nor is it easie to cure this Defect, since it deceives others as well as those who have it with a shew of very great Ingenuity. The vivacity of such Persons makes their Conversation plausible, and taking with those who consider not much, tho not with the Judicious; it procures for them the Character of Wit, but hinders them from being Wise. For truth is not often found by such as won’t take Time to examine her Counterfeits, to distinguish between Evidence and Probability, Realities and Appearances, but who thro a conceit of their own sharp-sightedness think they can pierce to the bottom with the first glance.