The heuristic aspects of the function and of the identity of the pneuma in the Fathers of the church (I-IV sec. d.C.)

The present study faces one of the fundamental themes of the dogmatic christian: the third person of the trinity. From an analytical reading of the texts of the Fathers, the author illustrates the essential lines, relative to the identity of the Spirit and to his function in the world and in the church, in a growing progressive, staying the most possible relating to the rielaboration of the datum revealed during the first 4 centuries.