Morality and its effect are regarded as one of most notable subjects in various persian texts and literature and various ethical subjects as well as many cases of sermon and advice may be seen in the texts. Among ethical and educational subjects speech and language and their effects are known as one of the most important ones. In most of our literal, mystical and historical there may be found a lot of points on the importance of speech and its properties, the addressee. The matters have been given with reliance on Quranic and traditional teachings. Such contents may be found in all literal styles including educational literature, poems and epics. This paper has studied the subject on the basis of Persian texts and speeches of outstanding authors and poets with regard to the sources of their works. As shown in the paper, what meant by authors as being of importance in ther works lies mainly on the educational nature of the contents and the ways for actualizing it in the addressee. Such being the case, therefore, one may not find any notable part for imaginary speeches; only in some cases we find examples of resemblance.