The doctoral thesis will be based primarily on the philosophy of Helmuth Plessner, who addressed the topic of the laughter and crying expression in specific texts (especially in Laughing and Crying, Das Lächeln), as well as in the context of his contribution to the anthropology of sense, the theory of expression, and the analysis of corporeality. In his philosophical anthropology, Plessner brings a critical perspective to the contemporary and traditional philosophical and scientific discourse that has developed around this topic, and offers his own approach to thematising the modes of expression in question in their original course and the relation of man to his corporeality.