Abstract: This article discusses the problems of textual linguistics as one of the most pressing issues in linguistics. It is emphasized that the movement of language in cognitive function and its activity as a product of this action is directly reflected in scientific texts. In addition, scientific texts have a special place in the typology of non-fiction texts. It is also noted that expressiveness in a scientific text differs from expressiveness in an artistic text by certain peculiarities. While expressiveness in a scientific text serves to concretize a concept, it has been proven to serve to create an image in fiction.