"Nevertheless the liturgy is the summit toward which the activity of the Church
is directed; at the same time it is the font from which all her power flows. For
the aim and object of apostolic works is that all who are made sons of God by
faith and baptism should come together to praise God in the midst of His
Church, to take part in the sacrifice, and to eat the Lord's supper."

Sacrosanctum Concilium (10)