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.
More than that, I count all things to be loss in view of the surpassing value of knowing Christ Jesus my Lord, for whom I have suffered the loss of all things, and count them but rubbish so that I may gain Christ
Then the Jews began to argue with one another, saying, “How can this man give us His flesh to eat?”
So Jesus said to them, “Truly, truly, I say to you, unless you eat the flesh of the Son of Man and drink His blood, you have no life in yourselves.