 In this article, which has reference mainly, but not exclusively, to the Ilāhiyyāt of Kitāb al-Šifāʾ (known in English as the Metaphysics of the Book of the Healing or of the Book of the Cure), I shall start—after introducing Avicenna’s sources—with a brief discussion of the status of metaphysics as a science, and then illustrate Avicenna’s analysis of existence and the theology that arises from it. Thereafter I shall focus on Avicenna’s theory of emanation, highlighting its essential aspects.