Abstract
In Kant, remarkably, and for the first time perhaps in the history of philosophy, the problem of the Ego receives an ontological signification. The critique of the paralogisms of rational psychology concerns, explicitly, this fundamental problem of the being of the ego. Kant’s examination of this problem constitutes an essential moment of the history of modern philosophy. This examination results finally in the complete failure to determine such a being, a failure that Kant attempts to pass off ultimately as a metaphysical impossibility. This is affirmed constantly through the labyrinthine analysis of the Transcendental Dialectic: what emerges from its difficulties, and obscurities, is that the being of the Ego can be neither determined, nor posited, metaphysically. The conclusion is unquestionably the following: the ego cogito does not contain in itself any sum, at least if, by the latter, one intends, as does rational psychology, the metaphysical and, in some way, absolute being of the ‘I’.