The interest of the young Brentano for the philosophy of Plato is linked to his Aristotelian studies. Brentano understands Aristotle’s philosophy in deep continuity with Plato’s one. This continuity is clear in one of the most controversial points of Brentano’s interpretation of Aristotle: the nature of God and the status of human soul. Brentano finds in both Plato and Aristotle a personal, monotheistic and creationistic God who also creates human soul, which is immortal. This approach is explained in some texts from the youth of Brentano, although there are signs indicating that he sustained it until the end of his life. In his interpretation of Plato’s God, we see that Brentano identifies Him with the Idea of Good and the Demiurge. The Idea of Good would have even created the other Platonic Ideas, which should be understood as gods.