The Author proposes to describe the possible foundations of a Trinitarian theism that may be a philosophically adequate translation of the Johannine declaration: “God is love”, introduced by some contemporary thinkers as a key to resolving some aporias within classic theism. This is done by way of analysis of Trinitarian ontology and relational ontology, for which there is an attempt to provide a shareable phenomenological basis. The paper then goes on to questions of epistemology (hyperphatic theology) linked to the ability (...) of human reason and human language to express the categories introduced in this analysis, categories that are nothing else but a renewed philosophical appreciation of the terminology proper to Trinitarian speculation. (shrink)