It is evident, that Wit cannot essentially consist in the Justness and Propriety of the Thoughts, that is, the Conformity of our Conceptions to the Objects we conceive; for this is the Definition of Truth, when taken in a Physical Sense; nor in the Purity of Words and Expression, for this may be eminent in the Cold, Didactick Stile, and in the correct Writers of History and Philosophy:  But Wit is that which imparts Spirit to our Conceptions and Diction, by giving them a lively and novel, and therefore an agreeable Form:  And thus its Nature is limited and diversify’d from all other intellectual Endowments.  Wit therefore is the Accomplishment of a warm, sprightly, and fertile Imagination, enrich’d with great Variety of proper Ideas; which active Principle is however under the Direction of a regular Judgment, that takes care of the Choice of just and suitable Materials, prescribes to the tighter Faculties the due Bounds of their Sport and Activity, and assists and guides them, while they imprint on the Conceptions of the Mind their peculiar and delightful Figures.  The Addition of Wit to proper Subjects, is like the artful Improvement of the Cook, who by his exquisite Sauce gives to a plain Dish, a pleasant and unusual Relish.  A Man of this Character works on simple Proportions a rich Embroidery of Flowers and Figures, and imitates the curious Artist, who studs and inlays his prepar’d Steel with Devices of Gold and Silver.  But Wit is not only the Improvement of a plain Piece by intellectual Enameling; besides this, it animates and warms a cold Sentiment, and makes it glow with Life and Vigor; and this it effects, as is express’d in the last Part of the Definition, by giving it as elegant and surprizing Turn.  It always conveys the Thought of the Speaker or Writer cloath’d in a pleasing, but foreign Dress, in which it never appear’d to the Hearer before, who however had been long acquainted with it; and this Appearance in the Habit of a Stranger must be admirable, since Surprize naturally arises from Novelty, as Delight and Wonder result from Surprize; which I have more fully explain’d in the former Essay.

As to its efficient Cause; Wit owes its Production to an extraordinary and peculiar Temperament in the Constitution of the Possessors of it, in which is found a Concurrence of regular and exalted Ferments, and an Affluence of Animal Spirits refin’d and rectify’d to a great degree of Purity; whence being endow’d with Vivacity, Brightness and Celerity, as well in their Reflexions as direct Motions, they become proper Instruments for the sprightly Operations of the Mind; by which means the Imagination can with great Facility range, the wide Field of Nature, contemplate an infinite Variety of Objects, and by observing the Similitude and Disagreement of their several Qualities, single out and abstract, and then suit and unite those Ideas, which will best serve its purpose.  Hence beautiful Allusions, surprizing Metaphors and admirable