Theology is in fact the intellectus fidei-the intelligence of the one faith, the same yesterday and today, composed of distinct but analogical mysteries. The truth is symphonic, as Hans Urs von Balthasar says. It is like one piece of music played by many instruments. The greater the variety of instruments playing the same piece, the better they express the beauty of that one musical score. The same should be true of the multitude of believers around the world. If this is not the case, there is some lack, not in the mystery, but in the approach to the faith. The role of a single instrument is only clear within the context of the whole symphony. Similarly, it is only within the context of the whole faith, starting with the faith of the Church, that one can distinguish the peculiarity of a single mystery. This is what I tried to do by bringing together individual tiles of theology-theological opinions offering an interpretation of dogma and its defence when necessary, holding on as close as possible to revealed dogma-in order to compose one grand mosaic.