The article deals with the issues of F. Aquinas ' social teaching about the teacher, teaching and upbringing, which have not yet been studied in socio-political science. The article deals in more detail with the issues of F. Aquinas ' social teaching – knowledge and cognition, sign and word, language of learning, moral, moral and aesthetic aspects of teaching,  on the transition and generation of knowledge from a student by a teacher, etc. The article notes that according to Aquinas, real education and upbringing is impossible without the use of authorities, authoritative books, their reading and interpretation. Learning means that one person transmits information about their knowledge or skill to another person. A teacher can be a person who independently expands his knowledge, is able to clearly formulate this knowledge for himself and transmit it to the student in an information accessible form for the student. At the same time, the article also pays attention to discussion issues.