The communicative theory is one of the subjects discussed in the language pragmatics that language and its applied methods in the communication process are investigated. In this process, there are six elements, of which the two elements, the addresser or the composer, as well as the addressee, are key elements; without them, communication is meaningless. The addresser uses common codes between himself/herself and the addressee to transpose a message about something beyond the context and through a specific communicative circuit to the addressee. This is the message whose function in the context is measured according to the user's intention of the language, namely the addresser. In Jakobson's view, the role and function of language will be different if the message, as the center of gravity, is addressed to each of the elements involved in the communication process. By adopting this diagram to Nahj al-Balaghah's letters and determining the linguistic functions in different contexts, the present study tries to investigate the effect of the addresser's intention and the type of message addressee on the language function. For this purpose, four letters that were sent in different contextual situations and addressed to different receivers were selected by descriptive-analytical and statistical methods compared to their linguistic functions. The result of this comparison signifies that although specifying linguistic functions in context clarifies the addresser of the message, it does not present a thorough analysis of the text. This subject was confirmed by the existence of linguistic differences in the contexts that were produced with the same purpose and motivation. The similarities in persuasive function and at the same time the difference in the way of expression make the analysis of the context based on the difference of the audience necessary.