We are bound by our love of God to attend mass at least on the Lord’s day and Holy Days of Obligation. As to Holy Communion, bear in mind that Saint Paul taught that unworthy reception of Holy Communion was to eat and drink damnation unto oneself. (
1 Cor. 11). A few applicable sections from the free online
catechism:
B]CCC1385 To respond to this invitation we must prepare ourselves for so great and so holy a moment. St. Paul urges us to examine our conscience: "Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of profaning the body and blood of the Lord. Let a man examine himself, and so eat of the bread and drink of the cup. For any one who eats and drinks without discerning the body eats and drinks judgment upon himself."218 Anyone conscious of a grave sin must receive the sacrament of Reconciliation before coming to communion.
CCC1386 Before so great a sacrament, the faithful can only echo humbly and with ardent faith the words of the Centurion: “Domine, non sum dignus ut intres sub tectum meum, sed tantum dic verbo, et sanabitur anima mea” (“Lord, I am not worthy that you should enter under my roof, but only say the word and my soul will be healed.”).219 And in the Divine Liturgy of St. John Chrysostom the faithful pray in the same spirit:
Code:
O Son of God, bring me into communion today with your mystical supper. I shall not tell your enemies the secret, nor kiss you with Judas' kiss. But like the good thief I cry, "Jesus, remember me when you come into your kingdom."
CCC1387 To prepare for worthy reception of this sacrament, the faithful should observe the fast required in their Church.220 Bodily demeanor (gestures, clothing) ought to convey the respect, solemnity, and joy of this moment when Christ becomes our guest.
CCC1415 Anyone who desires to receive Christ in Eucharistic communion must be in the state of grace. Anyone aware of having sinned mortally must not receive communion without having received absolution in the sacrament of penance.*