The title of this chapter refers to the fact that language is in intimate contact not only with cognition and consciousness, as has been analysed in Chapter 2 when discussing the epistemology of psychology, but also with the entirety of human mental life. The categories of the relationship to reality are formulated in language and through language, but in the same way it is language that mediates emotions and motivations that produce the patterns of these relations characteristic of individuals and groups of individuals.