Metaphor as an interesting language and cognitive phenomenon has been studied for over two thousand years. There are different approaches to metaphor research. When it comes to metaphors, her aesthetic role is studied in literature but it is also important in language analysis where it focuses on the emergence of metaphor, and the relationship of allegorical and literal meaning. Forming the theory of conceptual metaphors in the field of cognitive linguistics opens new questions about the role of metaphor, which is no longer just a matter of language analysis, but the metaphor phenomenon is transmitted to the field of thinking and creation of concepts, terms and categories. We come to the conclusion that the whole language is metaphorical, because the way we think and understand the world is precisely metaphorical. Lakoff and Johnson, the authors who founded the theory of conceptual metaphors, point out in what way the theory of conceptual metaphors changes the perception of knowledge. Through the analysis of the myths of subjectivism and objectivism, Lakoff and Johnson came to their own concept of experientialistic myth as a solution to limitations of previous two myths. The subjectivity of the metaphorical expression is the reason why usage of metaphores was avoided, therefore the concept of conceptual metaphors opposes the positivist paradigm of science.