Among different channels and means of education language occupies the most prominent place. Its functions, particularly in relation to interpersonal processes, are analyzed. Main attention is given to the so-called emancipatory function of language specifically instrumental in achieving the primary goal of education - development of a psychologically, socially, and educationally mature person. From this standpoint some new light is shed on relations between language and thought, language and behavior. Learning-education role of contradictions in the instructional material is shown. The article is concluded by the author with introduction of a concept of a "persona linguistica".