In celebration of the centenary of the Italian philosopher Cornelio Fabro's birth (1911–1995), this paper investigates the essential theoretical traits that undergird the framework of Fabro's 1941 texts, by comparing them with Franz Brentano's (1838–1817) project of renewing Thomism through a new understanding of Aristotle. The secondary literature concerning the comparison of both these authors is almost nonexistent. Our goal is to clarify some of the central issues regarding the relation between Fabro and Brentano through direct textual analysis of unpublished letters exchanged between Fabro and Agostino Gemelli about Brentano and his pupil Carl Stumpf.