What role does language play both in knowledge making and its transmition in different contexts? How can the study of concepts contribute to the study of knowledge shaping? In this paper the study is focused on the particular ways language, or more precisely concepts are used by actors; a historical fact that plays fundamental role both in the distinction of “scientific” from non “scientific” knowledge and in the definition of the natural objects themselves, while at the same time it is a crucial factor that mediates, categorizes and shapes the relation between the natural and the historical world. Leviathan the revolutionary work of Thomas Hobbes and its historical background will be the main focus of this paper. Through the study of the connections the concept incorporeality and its various articulations develop with the sociopolitical tensions reflected in the text, I will try to identify the ways in which a certain kind of scientific knowledge was shaped while it kept distinct from other ways of doing natural philosophy during the mid-17th century. The shape and the categorization of knowledge are primarily performed within language, and that's the central concern of this paper.