express, which faith allows us to touch. ‘The believer’s act [of faith] does not terminate in the propositions, but in the realities [which they express].’~6 All the same, we do approach these realities with the help of formulations of the faith which permit us to i86 express the faith and to hand it on, to celebrate it in community, to assimilate and live on it more and more. 171 The Church, ‘the pillar and bulwark of the truth’, faithfully 78 guards ‘the faith which was once for all delivered to the saints’. She 857, 84 guards the memory of Christ’s words; it is she who from genera tion to generation hands on the apostles’ confession of faith. ~ As a mother who teaches her children to speak and so to understand and communicate, the Church our Mother teaches us the language 185 of faith in order to introduce us to the understanding and the life of faith. III. Only One Faith 172 Through the centuries, in so many languages, cultures, peoples and nations, the Church has constantly confessed this one faith, received from the one Lord, transmitted by one Baptism, and grounded in the conviction that all people have only one God 813 and Father.~8 St Irenaeus of Lyons, a witness of this faith, declared: 173 ‘Indeed, the Church, though scattered throughout the whole world, even to the ends of the earth, having received the faith from the apostles and their disciples... guards [this preaching and faith] with care, as dwelling in but a single house, and similarly elieves as if having but one soul and a single heart, and preaches, aches and hands on this faith with a unanimous voice, as if posssing only one mouth.’59 4 ‘For though languages differ throughout the world, the cont of the Tradition is one and the same. The Churches established 78 U U Germany have no other faith or Tradition, nor do those of the rians, nor those of the Celts, nor those of the East, of Egypt, of ~ya, nor those established at the centre of the world. ‘6o The rch’s message ‘is true and solid, in which one and the same salvation appears throughout the whole world.’6’