(from par. 1)
I have decided to announce a Year of Faith. It will begin on 11 October 2012, the fiftieth anniversary of the opening of the Second Vatican Council, and it will end on the Solemnity of Our Lord Jesus Christ, Universal King, on 24 November 2013. The starting date of 11 October 2012 also marks the twentieth anniversary of the publication of the Catechism of the Catholic Church, a text promulgated by my Predecessor, Blessed John Paul II, with a view to illustrating for all the faithful the power and beauty of the faith. This document, an authentic fruit of the Second Vatican Council, was requested by the Extraordinary Synod of Bishops in 1985 as an instrument at the service of catechesis and it was produced in collaboration with all the bishops of the Catholic Church. Moreover, the theme of the General Assembly of the Synod of Bishops that I have convoked for October 2012 is “The New Evangelization for the Transmission of the Christian Faith”. This will be a good opportunity to usher the whole Church into a time of particular reflection and rediscovery of the faith.
(from par. 4)
I would like to sketch a path intended to help us understand more profoundly not only the content of the faith, but also the act by which we choose to entrust ourselves fully to God, in complete freedom. In fact, there exists a profound unity between the act by which we believe and the content to which we give our assent. Saint Paul helps us to enter into this reality when he writes: “Man believes with his heart and so is justified, and he confesses with his lips and so is saved” (Rom 10:10). The heart indicates that the first act by which one comes to faith is God’s gift and the action of grace which acts and transforms the person deep within.
The example of Lydia is particularly eloquent in this regard. Saint Luke recounts that, while he was at Philippi, Paul went on the Sabbath to proclaim the Gospel to some women; among them was Lydia and “the Lord opened her heart to give heed to what was said by Paul” (Acts16:14). There is an important meaning contained within this expression. Saint Luke teaches that knowing the content to be believed is not sufficient unless the heart, the authentic sacred space within the person, is opened by grace that allows the eyes to see below the surface and to understand that what has been proclaimed is the word of God.
Confessing with the lips indicates in turn that faith implies public testimony and commitment. A Christian may never think of belief as a private act. Faith is choosing to stand with the Lord so as to live with him. This “standing with him” points towards an understanding of the reasons for believing. Faith, precisely because it is a free act, also demands social responsibility for what one believes. The Church on the day of Pentecost demonstrates with utter clarity this public dimension of believing and proclaiming one’s faith fearlessly to every person. It is the gift of the Holy Spirit that makes us fit for mission and strengthens our witness, making it frank and courageous.
(from par. 10)
---Benedict XVI, Apostolic Letter, Moto Proprio Data, Porta Fidei. (For the Indiction of the Year of Faith.)