Here is an extract from the Popes homily today at the opening of the Year of Faith, read it all here.
I believe that the most important thing, especially on such a significant occasion as this, is to revive in the whole Church that positive tension, that yearning to announce Christ again to contemporary man. But, so that this interior thrust towards the new evangelization neither remain just an idea nor be lost in confusion, it needs to be built on a concrete and precise basis, and this basis is the documents of the Second Vatican Council, the place where it found expression. This is why I have often insisted on the need to return, as it were, to the “letter” of the Council – that is to its texts – also to draw from them its authentic spirit, and why I have repeated that the true legacy of Vatican II is to be found in them. Reference to the documents saves us from extremes of anachronistic nostalgia and running too far ahead, and allows what is new to be welcomed in a context of continuity. The Council did not formulate anything new in matters of faith, nor did it wish to replace what was ancient. Rather, it concerned itself with seeing that the same faith might continue to be lived in the present day, that it might remain a living faith in a world of change.