Holy Communion

In the Catechism of the Catholic Church, it states that "The Lord addresses an invitation to us, urging us to receive him in the sacrament of the Eucharist: 'Truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you.' 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.' Anyone conscious of a grave sin must receive the Sacrament of Reconciliation (confession) before coming to communion.
Before so great a sacrament, the faithful can only echo humbly and with ardent faith the words of the Centurion: ('Lord, I am not worthy that you should enter under my roof, but only say the word and my soul will be healed.') ....To prepare for worthy reception of this sacrament, the faithful should observe the fast required in their Church. Bodily demeanor (gestures, clothing) ought to convey the respect, solemnity, and joy of this moment when Christ becomes our guest. It is in keeping with the very meaning of the Eucharist that the faithful, if they have the required dispositions, receive communion when they participate in the Mass. As the Second Vatican Council says: 'That more perfect form of participation in the Mass whereby the faithful, after the priest's communion, receive the Lord's Body from the same sacrafice, is warmly recommended.'
....the Church strongly encourages the faithful to receive the Holy Eucharist on Sundays and feast days, or more often still, even daily. Since Christ is sacramentally present under each of the species, communion under the species of bread alone makes it possible to receive all the fruit of Eucharistic grace. For pastoral reasons this manner of receiving communion has been legitimately established as the most common form in the Latin rite. But 'the sign of communion is more complete when given under both kinds, since in that form the sign of the Eucharistic meal appears more clearly. ' ....Communion with the flesh of the risen Christ, a flesh 'given life and giving life through the Holy Spirit,' preserves, increases and renews the life of grace received at Baptism. This growth in Christian life needs the nourishment of Eucharistic Communion, the bread of our pilgrimage until the moment of death, when it will be given to us as viaticum.
Holy Communion separates us from sin. The body of Christ we receive in Holy Communion is 'given up for us,' and the blood we drink 'shed for the many for the forgiveness of sins.' For this reason the Eucharist cannot unite us to Christ without at the same time cleansing us from past sins and preserving us from future sins. As bodily nourishment restores lost strength, so the Eucharist strengthens our charity, which tends to be weakened in daily life; and this living charity wipes away venial sins. ....By the same charity that it enkindles in us, the Eucharist preserves us from future mortal sins. The more we share the life of Christ and progress in his friendship, the more difficult it is to break away from him by mortal sin. The Eucharist is not ordered to the forgiveness of mortal sins - that is proper to the sacrament of Reconciliation (confession). The Eucharist is properly the sacrament of those who are in full communion with the Church."
Catechism of the Catholic Church
Nos. 1384-1390, 1392-1395
Before so great a sacrament, the faithful can only echo humbly and with ardent faith the words of the Centurion: ('Lord, I am not worthy that you should enter under my roof, but only say the word and my soul will be healed.') ....To prepare for worthy reception of this sacrament, the faithful should observe the fast required in their Church. Bodily demeanor (gestures, clothing) ought to convey the respect, solemnity, and joy of this moment when Christ becomes our guest. It is in keeping with the very meaning of the Eucharist that the faithful, if they have the required dispositions, receive communion when they participate in the Mass. As the Second Vatican Council says: 'That more perfect form of participation in the Mass whereby the faithful, after the priest's communion, receive the Lord's Body from the same sacrafice, is warmly recommended.'
....the Church strongly encourages the faithful to receive the Holy Eucharist on Sundays and feast days, or more often still, even daily. Since Christ is sacramentally present under each of the species, communion under the species of bread alone makes it possible to receive all the fruit of Eucharistic grace. For pastoral reasons this manner of receiving communion has been legitimately established as the most common form in the Latin rite. But 'the sign of communion is more complete when given under both kinds, since in that form the sign of the Eucharistic meal appears more clearly. ' ....Communion with the flesh of the risen Christ, a flesh 'given life and giving life through the Holy Spirit,' preserves, increases and renews the life of grace received at Baptism. This growth in Christian life needs the nourishment of Eucharistic Communion, the bread of our pilgrimage until the moment of death, when it will be given to us as viaticum.
Holy Communion separates us from sin. The body of Christ we receive in Holy Communion is 'given up for us,' and the blood we drink 'shed for the many for the forgiveness of sins.' For this reason the Eucharist cannot unite us to Christ without at the same time cleansing us from past sins and preserving us from future sins. As bodily nourishment restores lost strength, so the Eucharist strengthens our charity, which tends to be weakened in daily life; and this living charity wipes away venial sins. ....By the same charity that it enkindles in us, the Eucharist preserves us from future mortal sins. The more we share the life of Christ and progress in his friendship, the more difficult it is to break away from him by mortal sin. The Eucharist is not ordered to the forgiveness of mortal sins - that is proper to the sacrament of Reconciliation (confession). The Eucharist is properly the sacrament of those who are in full communion with the Church."
Catechism of the Catholic Church
Nos. 1384-1390, 1392-1395