From the Trinity provides an overall view of the history and the philosophical and theological significance of God the Trinity, not only from a religious point of view but from an anthropological and socio-cultural view as well. The perspective is that of Christian doctrine, specifically Catholic, in dialogue with the cultural sensitivity of our times and with the religious pluralism that characterizes it. Following the generative-progressive method proposed by Vatican II, the book begins with a phenomenological reading of the signs of the times, with special focus upon the performative aspect of the announcement and the doctrine of faith. In particular, constant attention to the contribution made by the mystics and great charisms (from Augustine of Hippo to Francis of Assisi and Theresa of Avila up until Therese of Lisieux, Edith Stein and Chaira Lubich) toward a deeper understanding of the Trinitarian truth. From the Trinity is unique in what it offers not only for Trinitarian theology, but also for other theological disciplines (Christology, Pneumatology, Anthropology, Ecclesiology, etc.) – in which the Trinity shines forth as the central and enlightening truth – as well as for philosophy, the humanities and the natural sciences. This perspective is especially developed in terms of a Trinitarian ontology (see Part V) by which reality is understood in light of the revelation of the Trinity. The implications of the incarnation of the Son of God and the gift of the Holy Spirit are taken seriously in studying the truth of all things as they are perceived in the space created by living and thinking “in” Jesus, united to the Father in the Spirit, as suggested by the title of the book, looking upon reality “From the Trinity.”