From the Latin trinus, meaning “threefold,” referring to the central mystery of the Christian faith that God exists as a communion of three distinct and interrelated Divine Persons: Father, Son, and Holy Spirit

To make holy; sanctification is the process of responding to God’s grace and becoming closer to God

A term that when capitalized designates Jesus’ Body in the Eucharist, or the entire Church

A person who suffers death because of his or her beliefs

A gathering of the Church’s bishops from around the world convened by the Pope or approved by him to address pressing issues in the Church

The Church’s official, public, communal prayer. It is God’s work, in which the People of God participate

The gift given by the Holy Spirit to the Church whereby the pastors of the Church, the Pope and the bishops in union with him, can definitively proclaim a doctrine of faith and morals without error

A prayer form in which one asks God for help and forgiveness

An official, authoritative teaching of the Church based on the Revelation of God

A habitual and firm disposition to do good