The article is devoted to the problems of determining the discourse on the basis of the analysis of the character’s speech. The focus of attention is the words of the author of thought, not burdened with communicative dependence. Such are the inner monologues of the character. The conditions of successful mental activity of the personality are revealed. The thought in the state of formation and the thought in its conclusion are differentiated. The paper concludes that the formation of a thought occurs not in the course of human interaction with reality, but in the process of independent interpretation of this interaction. Finally it is observed that the thought in its conclusion is the result of interpretation of its features.