Mani was born from the Persian parents in Babylonia, which was a part of the province of Asoristan in the Parthian empire. According to the Historical evidences, Iranians have been eloquent people, and Mesopotamia was consideredas the confluence of the various ideas, thoughts and myths. Being in an Iranian family and training in Babylonia caused to improve mani's thought and art Undoubtedly, we can find in his poetry, an aspect of pre-Islamic Iranian rhetoric which is survived in middle Persian and parthian hymns. Part of Iranians' attainments in the field of poetical imagination are displayed in these hymns. In this article two hymns, attributed to mani, one in the middle Persian and the other in the Parthian language, have been studied from aestethical point of view. The rhetorical speeches used in these two hymns such as, simile, metaphor, metonymy, kenning, repetition, taxis, synesthesia, amphiboly and opacity can display a kind of excellent achievement in poetic imagination that is very important in the history of Persian literature in Iran. In these hymns, literary and rhetorical features have been applied to express Mani’s thoughts that, if necessary, have been explained too.