The principal expression of our worship to God is that of the Mass. From the Introductory Rites, to the Liturgy of the Word, to the Liturgy of the Eucharist and ending with the Concluding Rite are all part of our praise and thanksgiving offering.
Mass was instituted by Christ himself at the Last Supper and by participating we confer the graces needed from God’s mercy to expiate the sins of the past and the graces needed from God’s bounty to obtain His blessings for the future.
As the living Father sent Me, and I live because of the Father, so he who eats Me, he also will live because of Me.
This is the bread which came down out of heaven; not as the fathers ate and died; he who eats this bread will live forever.