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First of all, I feel I ought to define my subject area in order to avoid any expectations and misunderstandigs which the title of my paper could create, considering the breadth and problematic nature of the theme (“constructing a theory”) and the importance and complexity of the two men of science in discussion. My reflections will principally take into consideration the comparison of two writings: Instincts and their Vicissitudes (1915a) by Freud and a letter written by Einstein to his friend Solovine, in which he summarizes his epistemological position with the help of a diagram (Holton 1973). However, after having outlined the limits of my considerations, I would also like to point out that my paper fits into the broader area of research on the epistemological and methodological roots of our discipline; research which maintains the teaching of Freud as a constant and mandatory point of reference.
I feel it is necessary to say something about the theoretical level I intend to operate on. I shall not be dealing with contents, the “objects”, of these