The dogma of the immortality of the spirit is a deeply held belief among Christians. Medieval thinkers struggled to formulate a rational argument for it that could withstand the challenges of a fluctuating and imperfect speculative tradition. Contemporary philosophy, with its denials, critiques, and uncertainties, has raised significant questions about this belief. Conversely, the absence of irrefutable rational justifications for such beliefs seems to increase their perceived value to adherents. The proliferation of contentious debates over the Averroist concept of an immortal spirit in medieval Latin schools is indicative of the complexity of philosophical discourse. These debates transcended the confines of academic argument and permeated public discourse and commercial interactions.