The author traces the road Dewey covered when he tried to free himself from a traditional ontology and epistemology. He did completely change understanding of the concept of experience. In the second part, author shows what it is meant to be “true”/“false” in the pragmatist logic and epistemology. It is indicated by explication of Dewey’s up-to-date conception of perception and knowledge. The role of action is stressed there. In the third part, author explains why our traditional approach to thinking could not accept this pragmatist understanding. He introduces there Dewey’s analysis of the old Greek idea of knowledge as seeing finalities of the “true world”. In the semi-final part, the author articulates Dewey’s conception of “ecological paradigm” that could be seen as final liberation from the old, powerful, yet false tradition of the separate objects ontology. There the conception of situational ontology is presented. In the last part, he summarizes a new understanding of knowledge, truth and situational ontology and thus determines a new meaning of experience. Experience there is understood as a not-subjective field of powers that cross back and forth borders of objects in a process of achieving equilibrium.