The difference of signification in words generally accounted synonymous, ought to be carefully observed; as in pride, haughtiness, arrogance:  and the strict and critical meaning ought to be distinguished from that which is loose and popular; as in the word perfection, which, though in its philosophical and exact sense it can be of little use among human beings, is often so much degraded from its original signification, that the academicians have inserted in their work, the perfection of a language, and, with a little more licentiousness, might have prevailed on themselves to have added the perfection of a dictionary.

There are many other characters of words which it will be of use to mention.  Some have both an active and passive signification; as fearful, that which gives or which feels terrour; a fearful prodigy, a fearful hare.  Some have a personal, some a real meaning; as, in opposition to old, we use the adjective young of animated beings, and new of other things.  Some are restrained to the sense of praise, and others to that of disapprobation; so commonly, though not always, we exhort to good actions, we instigate to ill; we animate, incite and encourage indifferently to good or bad.  So we usually ascribe good, but impute evil; yet neither the use of these words, nor, perhaps, of any other in our licentious language, is so established as not to be often reversed by the correctest writers.  I shall, therefore, since the rules of style, like those of law, arise from precedents often repeated, collect the testimonies on both sides, and endeavour to discover and promulgate the decrees of custom, who has so long possessed, whether by right or by usurpation, the sovereignty of words.

It is necessary, likewise, to explain many words by their opposition to others; for contraries are best seen when they stand together.  Thus the verb stand has one sense, as opposed to fall, and another, as opposed to fly; for want of attending to which distinction, obvious as it is, the learned Dr. Bentley has squandered his criticism to no purpose, on these lines of Paradise Lost: 

         —­In heaps
  Chariot and charioteer lay overturn’d,
  And fiery foaming steeds.  What stood, recoil’d
  O’erwearied, through the faint Satanic host,
  Defensive scarce, or with pale fear surpris’d,
  Fled ignominious.—­

“Here,” says the critick, “as the sentence is now read, we find that what stood, fled:”  and, therefore, he proposes an alteration, which he might have spared, if he had consulted a dictionary, and found that nothing more was affirmed than, that those fled who did not fall.