In this introduction to Catholic doctrine on the Trinity, Gilles Emery presents extensive research on the foundations of Trinitarian reflection. At its heart is a synthetic exposition of the persons of the Father, the Son, and Holy Spirit in their divine being and mutual relations, and in their action for us.
“According to St. Thomas, the person is defined by the integration of the following three elements: (1) individuality; (2) substance; (3) a nature endowed with faculties of intelligence and will.” (Page 102)
“We do not have access to the Trinity outside what God revealed to us by sending his own Son and giving us his Holy Spirit. This point is crucial.” (Page 1)
“2. The relationship of Father and Son is characterized also by their unity of action and of power.” (Page 28)
“First, the Father and the Son are one single principle of the Holy Spirit” (Page 144)
“Recall that, by economy, we mean the action by which the Trinity reveals and communicates himself, particularly the incarnation of the Son and the sending of the Holy Spirit; by theology, we mean the life of the Trinity in itself in its eternal being.” (Page 159)