The first rule which Bossu prescribes to the writer of an heroic poem, and which holds too by the same reason in all dramatic poetry, is to make the moral of the work; that is, to lay down to yourself what that precept of morality shall be, which you would insinuate into the people; as, namely, Homer's (which I have copied in my "Conquest of Granada,") was, that union preserves a commonwealth and discord destroys it. Sophocles, in his OEdipus, that no man is to be accounted happy before his death. It is the moral that directs the whole action of the play to one centre; and that action or fable is the example built upon the moral, which confirms the truth of it to our experience. When the fable is designed, then, and not before, the persons are to be introduced, with their manners, characters, and passions. The manners, in a poem, are understood to be those inclinations, whether natural or acquired, which move and carry us to actions, good, bad, or indifferent, in a play; or which incline the persons to such or such actions. I have anticipated part of this discourse already, in declaring that a poet ought not to make the manners perfectly good in his best persons; but neither are they to be more wicked in any of his characters, than necessity requires. To produce a villain, without other reason than a natural inclination to villainy, is, in poetry, to produce an effect without a cause; and to make him more a villain than he has just reason to be, is to make an effect which is stronger than the cause. The manners arise from many causes; and are either distinguished by complexion, as choleric and phlegmatic, or by the differences of age or sex, of climates, or quality of the persons, or their present condition. They are likewise to be gathered from the several virtues, vices, or passions, and many other common-places, which a poet must be supposed to have learned from natural philosophy, ethics, and history; of all which, whosoever is ignorant, does not deserve the name of poet.