Abstract
The article analyzes Yassawi research and research conducted by the scientist Rabiga Syzdyk in this direction, including the importance and role of the study «Yassawi Hikmetterinin tili» (The Language of the Hikmets of Yassavi) in science. The author reveals their essence using such concepts as «Yassavitology, Sufism, The Language of Hikmets, Tariqat. The tradition, experience of Sufi teaching, as well as the analysis and study of the conclusions of researchers belong to a very urgent problem in terms of the spiritual and religious needs of Kazakh Society of the XXI century, their recognition, study, work with the original. The article aims to formulate and substantiate the scientific and theoretical basis and significance of this problem using the " The Language of the Hikmets of Yassavi ", to identify the features of the study. The research work uses methods of comparison, analysis, description and control, and gives examples from the language of "Hikmets". As a result, it was concluded that it is necessary to identify the features of oral and written speech traditions of the people of that period, their influence on the heritage of Yassavi, as well as to determine the difference and continuity between the old language and the Kazakh language based on specific materials, and in this regard, R.Syzdyk's research works can serve as a very important scientific basis.