Why speak about a new practical theology, when practical theology seems to be as old as theology itself? Is another "new approach" really necessary? The work aims to set practical theology on a new foundation as it explores the discipline's modes of discourse, leaving aside the question of contents. Practical theology is examined from the point of view of its workings, as it attempts to grasp and give account of faith practices. In the course of this examination, questions relative to the linguistic apparatus are raised. Is this apparatus always coherent? Does it allow for the creation of a...