Liturgy, stemming from a Greek word meaning “public work,” is a communal and organized act of worship. It involves active participation of individuals or groups on behalf of the larger community rather than being mere entertainment. It is a sacred endeavor, not a spectator event. In liturgy, worshipers engage in the actions of Christ, the High Priest, and his Church, collectively taking part in the work of God.

The significance of liturgy lies in its focus on the Holy Trinity. Each liturgical event is directed towards the Father, through the Son, in the unity of the Holy Spirit. It acknowledges the Father’s role in sending the Son as Redeemer and gifting the Holy Spirit for the benefit of God’s people. Through liturgical celebrations, believers participate in the Paschal Mystery of Christ—the transition from death to eternal glory—similar to the ancient Israelites’ passage from slavery to freedom in the Book of Exodus.

Liturgy also serves as a means of understanding Jesus Christ and the mysteries being commemorated. It brings to light visible yet concealed truths. The death and Resurrection of Jesus are made present and effective through the Church’s liturgical life. Though hidden within God’s eternal realm, these events are shared with believers through liturgy—gatherings for worship and remembrance.

The Holy Spirit, the Church’s life source, unites believers in these actions, especially through the Sacraments, which are essential components of liturgy. While liturgy encompasses all official public prayers, Sacraments specifically address Christ’s redemptive work in celebrations.