"What is Liturgy?"- Liturgy refers to public work or service done by other people. Through liturgy, Christ continues the work of redemption with, in, and through the church.
"Mass as sacrifice"- The Eucharist is a sacrifice. The first Christians wrote about how the Eucharist was a true sacrifice in their writings. The first Christians also wrote down Jesus' instruction "Do this in memory of me." The Eucharist is regarded as the Christian sacrifice.
"Community and Liturgy"- Through the liturgy, the people in the community come together as one and pray to God together.
"Liturgical Diversity in the Chruch"- There are many different diverse or different traditions that the Chruch has. These traditions show the richness of the mystery of Christ.