Why is Mass so important to Christians?
It celebrates the life and death of Jesus.Roman Catholic AnswerThe Mass, or the Eucharist, is the means that God has given us to actually witness His Son's Passion and Death on Calvary, and to participate, through Holy Communion, in the graces that Our Blessed Lord makes available to us. It is not "done again", but we are actually present both at the Last Supper and at Our Blessed Lord's Death on Calvary, just as in a Passover Seder, a Jewish man says, "When I came out of Egypt" - the Passover happened thousands of years ago, but when a Jew celebrates the Passover Supper, he is present at the original Passover in Egypt.