Instead of challenging the imperialism of classical ontology, in Binswanger and Ricœur, we find the suggestion of another mode of Being that could be the foundation of relationship (we-hoop, solicitude). The theologian and philosopher K. Hemmerle sketched the main lines of such an ontology that he called Trinitarian ontology. A joint reading of these authors benefits from Levinassian ethics’ questioning of fundamental ontology, but beyond that criticism, it makes us able to recognize another figure of Being that deeply justifies relationship between us and to the other.