*CATECHISM OF CATHOLIC CHURCH TEACHINGS* (ccc) *185. When is the infallibility of the Magisterium exercised?* Infallibility is exercised when the Roman Pontiff, in virtue of his office as the Supreme Pastor of the Church, or the College of Bishops, in union with the Pope especially when joined together in an Ecumenical Council, proclaim by a definitive act a doctrine pertaining to faith or morals. Infallibility is also exercised when the Pope and Bishops in their ordinary Magisterium are in agreement in proposing a doctrine as definitive. Every one of the faithful must adhere to such teaching with the obedience of faith. *Further reading: CCC 890-891* *186. How do Bishops exercise their ministry of sanctification?* Bishops sanctify the Church by dispensing the grace of Christ by their ministry of the word and the sacraments, especially the Holy Eucharist, and also by their prayers, their example and their work. *Further reading: CCC 893*