In his many books devoted to Aristotle (mainly selections of texts in translation, with annotations and interpretative essays), Armando Carlini sketches out an original theoretical analysis, echoing the main tenets of his own philosophical development. According to Carlini, Aristotle’s “religious problem” goes beyond philosophy of religion and links ontology and gnoseology within a framework of philosophical ‘actualism’. At different degrees, the essence of God and man is thought and self-cosciousness. God is the full actuality of self-thinking, the perfect form of self-consciousness. Man, as he experiences that contemplative life described in Nicomachean Ethics bk. 10, is a self-consciousness in search of the self; and he does it by going up the other from himself (multiplicity, world etc.). In his actualistic analysis of bks. 7-8-9 and 12 of the Metaphysics, Carlini points out that Aristotle’s inquiry on the “on he on” (“being qua being) is fully revealed as “act within the act of knowledge”. There is a complete coincidence of the actuality of substance and the act through which we attain its knowledge: Aristotle’s ousia is the perfect synthesis of ‘act of thinking’ and ‘the thought object’.