In Islamic civilization, rhetoric is the product of a great attempt to find out the secrets of Quranic language; nevertheless, the achievements of such studies have been mechanically applied to Persian which, compared to Arabic, has a different linguistic system and literary conventions. This approach has brought about problems in defining literary terms, internal rhythm being one of them. This article, through comparing the classical and modern understandings of internal rhythm, and also by considering the history of studies on this concept, examines the quality of meter in internal rhythm.
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