Abstract
Heidegger’s famous critique of the onto-theo-logy accuses the whole Western metaphysics of having led us to a “forgetfulness of being”. The following pages pay attention to two attempts to respond to this attack: Marion’s, who prefers, with Heidegger, to liberate God from the realms of being; Gilson’s, who attributed to Thomas Aquinas a natural theology in a certain discontinuity with classical metaphysics. Secondly, this article intends to propose a clearer continuity between the Christian concept of God and Aristotelian ontology in particular, which is itself open.