Celebrating Sunday Mass is of the utmost importance in Catholic Churches because it is a command of God and of Christ. It is also where Catholics gather to pray together and receive Jesus Christ through the Holy Communion.
Catholics believe celebrating Sunday Mass is a command from God, as it is a way to honor the third commandment that asks believers to keep the Lord's day holy. Sunday replaced the Sabbath as the day of worship, as it is the day that marks the resurrection of Jesus Christ. It is on this day, after his resurrection, that Jesus appeared to two disciples and broke bread with them.
Catholics attend Sunday Mass because it is a commandment of Christ. During the last supper, Jesus broke bread and gave it to his disciples. He commanded them to do the same in remembrance of him. The commandments of the Catholic Church also require believers to attend Sunday Mass and to receive the Holy Communion at least once a year during Easter.
Catholics believe that Sunday Mass is a sacrifice and a meal. Catholics believe that at the consecration, the bread and wine become the body and blood of Jesus, which they share in remembrance of him. Taking the Holy Communion strengthens the union between the believers and Jesus Christ and increases their love for God and their neighbors.