ملخص الدراسة:

Proportion is one of the rhetorical terms used to conceive aesthetic feature and to explain a certain level of rhythm where speech characteristics belong to a class of rhetoric with collection of conditions are realized . According to the dissimilarity of these conditions, the rhetorical or Proportional levels are differentiate, on the base that the proportion in its final result represents the rhetoric and eloquence of the text. These terms have meaning which meet in many sides to refer to the rhetoricians distinguished among them in semantics and the conditions of structure in the text. This text is an attempt to recognize proportion concept as a linguistic and aesthetic values as well as the assembled terms with it semantically and functionally: harmony, similarity and congruity. The investigation in these aesthetic values will be presented through the 'sura of Mohammed' "PBUH". This researed prefers to use proportion as a title through clarifying its aspects in this sura.