In this rigorous and accessible essay, the renowned theologian Josep Maria Rovira Belloso reflects on the basis and the role of Christian Faith upon today’s society, both at an individual and collective level. In the first chapters, Rovira Belloso delves into the distant past (the origins and the sources of Christianity) and then to the recent past (the current context: the cultural revolution of the 1960s), to offer his reflections about the current situation. After uncovering the true foundation of Christian belief (why do we need God?) and the significance of this faith and this experience of God at an individual and a collective level (faith in community and the community of faith), he moves on to an analysis, seen through a new focus, of the different meanings of faith in current society.Three hundred pages of Theology explained in an entertaining and detailed way that will help many readers to understand the meaning of spiritual experience better.