This book argues that the doctrine of God taken for granted in the catholic tradition (divine transcendence, creatio ex nihilo, divine simplicity) makes it impossible to give an intelligible and coherent interpretation of the verbal formulas of the catholic dogmas of Trinity and incarnation. By way of response to this apparent incoherence at the heart of the catholic theological tradition, it proposes an alternative post-catholic take on these central doctrines in the light of a qualified monistic conception of God and a "Spirit Christological" interpretation of Jesus's relation to God the Father as presented in the New Testament.