The Physician, by the study and inspection of urine and ordure, approves himself in the science; and in like sort should our author accustom and exercise his imagination upon the dregs of nature.
The best way to prove the clearness of our mind, is by showing its faults; as when a stream discovers the dirt at the bottom, it convinces us of the transparency and purity of the water.
True Wit is Nature to advantage dress'd What oft was thought, but ne'er so well express'd; Something whose truth convinced at sight we find, That gives us back the image of our mind. As shades more sweetly recommend the light, So modest plainness sets off sprightly wit.