In handling the present subject, it would be endless to trace even the ordinary passions through their nicer and more minute differences. Mine shall be an humbler task; which is, to select from the best writers instances of faulty sentiments, after paving the way by some general observations. To talk in the language of music, each passion hath a certain tone, to which every sentiment proceeding from it ought to be tuned with the greatest accuracy. This is no easy work, especially where such harmony is to be supported during the course of a long theatrical representation. In order to reach such delicacy of execution, it is necessary that a writer assume the precise character and passion of the personage represented. This requires an uncommon genius. But it is the only difficulty; for the writer, who, forgetting himself, can thus personate another, so as to feel truly and distinctly the various agitations of the passion, need be in no pain about the sentiments: these will flow without the least study, or even preconception; and will frequently be as delightfully new to himself as afterward to his reader. But if a lively picture even of a single emotion require an effort of genius; how much greater must the effort be, to compose a passionate dialogue, in which there are as many different tones of passion as there are speakers? With what ductility of feeling ought a writer to be endued who aims at perfection in such a work; when, to execute it correctly, it is necessary to assume different and even opposite characters and passions, in the quickest succession? And yet this work, difficult as it is, yields to that of composing a dialogue in genteel comedy devoid of passion; where the sentiments must be tuned to the nicer and more delicate tones of different characters. That the latter is the more difficult task, appears from considering, that a character is greatly more complex than a passion, and that passions are more distinguishable from each other than characters are. Many writers accordingly who have no genius for characters, make a shift to represent, tolerably well, an ordinary passion in its plain movements. But of all works of this kind, what is truly the most difficult, is a characteristical dialogue upon any philosophical subject. To interweave characters with reasoning, by adapting to the peculiar character of each speaker a peculiarity not only of thought but of expression, requires the perfection of genius, taste, and judgement.