The theory of comedy on which _The Busie Body_ rests is a traditional one, but Mrs. Centlivre's simple pronouncements on the virtues of realistic over sentimental comedy are interesting because of the controversy on this subject among critics and writers at this time. In the preface to her first play, _The Perjur'd Husband_ (1700), she takes issue with Jeremy Collier on the charge of immorality in realistic plays. The stage, she believes, should present characters as they are; it is unreasonable to expect a "Person, whose inclinations are always forming Projects to the Dishonor of her Husband, should deliver her Commands to her Confident in the Words of a Psalm." In a letter written in 1700 she says: "I think the main design of Comedy is to make us laugh." (Abel Boyer, _Letters of Wit, Politicks, and Morality_, London, 1701, p. 362). But, she adds, since Collier has taught religion to the "Rhiming Trade, the Comick Muse in Tragick Posture sat" until she discovered Farquhar, whose language is amusing but decorous and whose plots are virtuous. This insistence on decorum and virtue indicates a concession to Collier and to the public. Thus in the preface to _Love's Contrivance_ (1703), she reiterates her belief that comedy should amuse but adds that she strove for a "modest stile" which might not "disoblige the nicest ear." This modest style, not practiced in early plays, is achieved admirably in _The Busie Body_. Yet, as she says in the epilogue, she has not followed the critics who balk the pleasure of the audience to refine their taste; her play will with "good humour, pleasure crown the Night." In dialogue, in plot, and particularly in the character of the amusing but inoffensive Marplot, she fulfills her simple theory of comedy designed not for reform but for laughter.