In a posthumous book by F. Meli1 there are joined two interesting studies in the history of philosophy. The first discusses the religious and political doctrines of Fausto Socino and their developments in the thought of the seventeenth century, and the second the rationalistic mentality of Spinoza. The two themes are essentially related, for in the religious rationalism of Socino the author recognizes one of the currents of thought that were to meet later in Spinoza’s philosophy. The first essay has the merit of greater novelty, because Socinian studies have been neglected up to the present and only touched on indirectly, in their repercussions rather than in their origins. For Meli the historical importance of Fausto Socino lies in the fact that he draws from the religious experience of the Reformation a new conception of religion, clearly affirming the principle that Holy Scripture does not aim at conveying abstract knowledge, a scientific doctrine, but on the contrary, as Galileo confirmed, it aims at increasing in us justice, charity, and the moral sense.