How easy it is to call rogue and villain, and that wittily! But how hard to make a man appear a fool, a blockhead, or a knave, without using any of those opprobrious terms! To spare the grossness of the names, and to do the thing yet more severely, is to draw a full face, and to make the nose and cheeks stand out, and yet not to employ any depth of shadowing.

Of Satire (1693)