The purpose of the research is to deepen the feeling of aesthetic entity of Arab poetry from moralities standpoint, that is the secret behind its immortality. and to affirm that the idiom of 'poets potency' by Alasmae is an aesthetic principle talking about the make inside the poem, its uniqueness, characteristics and the effect of the poet on others who come later . This poem was chosen from the rest of his poetry as a measure of Alhadera's potency because of its uniqueness and characteristics . The research method: text induction by searching on proofs about poetry potency in this poem, if there is many we are satisfied with some samples which indicate others, so that we avoid extension ,boredom and increasing repetition towards one side. the comparison has been done between its entity and Thalaba Ebn Soaer Almazne poem entity (Does Amra have victuals of a traveler..) to show that there are similarities in some parts of the image and there is a difference inside the inner entity. The research is based on the entity of the poem, its structure method, creative characters and the causes of its uniqueness. The research results: the purpose has been achieved, we recognize the uniqueness of the poem in its structural method, poetical images and moveable scenes, also the specialty of the poet in creating the whole poem and how it affects other poets just with even a few of its aspects.