encyclical on faith. For this I am deeply grateful to him, and as his brother in Christ I have taken up his fine work and added a few contributions of my own." Post-synodal apostolic exhortation Sacramentum caritatis (The Sacrament of Charity), signed 22 February 2007, was released in Latin, Italian, English, French, German, Portuguese, Spanish, and Polish. It was made available in various languages on 13 March 2007 in Rome. The English edition of Libera Editrice Vaticana is 158 pages. This apostolic exhortation "seeks to take up the richness and variety of the reflections and proposals which emerged from the Ordinary General Assembly of the Synod of Bishops" which was held in 2006. Motu proprio on Tridentine Mass On 7 July 2007, Benedict issued the motu proprio Summorum Pontificum, declaring that upon "the request of the faithful", the celebration of Mass according to the Missal of 1962 (of the Tridentine Mass), was to be more easily permitted. Stable groups who previously had to petition their bishop to have a Tridentine Mass may now merely request permission from their local priest. While Summorum Pontificum directs that pastors should provide the Tridentine Mass upon the requests of the faithful, it also allows for any qualified priest to offer private celebrations of the Tridentine Mass, to which the faithful may be admitted if they wish. For regularly scheduled public celebrations of the Tridentine Mass, the permission of the priest in charge of the church is required. In an accompanying letter, the Pope outlined his position concerning questions about the new guidelines. As there were fears that the move would entail a reversal of the Second Vatican Council, Benedict emphasised that the Tridentine Mass would not detract from the council and that the Mass of Paul VI would still be the norm and priests were not permitted to refuse to say the Mass in that form. He pointed out that the use of Tridentine Mass "was never juridically abrogated and, consequently, in principle, was always permitted." The letter also decried "deformations of the liturgy ... because in many places celebrations were not faithful to the prescriptions of the new Missal" as the Second Vatican Council was wrongly seen "as authorising or even requiring creativity", mentioning his own experience. The Pope considered that allowing the Tridentine Mass to those who request it was a means to prevent or heal schism, stating that, on occasions in