What sins prevent people from receiving Holy Communion? The sacrament of the Eucharist is considered one of the most important in the Catholic Church. According to many priests, receiving Holy Communion is necessary to participate fully in Mass. Regular reception of the Eucharist is also one of the prerequisites for the salvation of the soul. "He who eats this breadHe will live forever," we read in Scripture.
To receive Holy Communion worthily, it is necessary to have a pure heart, free from sin. For this purpose, before each reception of the Eucharist it is worth to go to confession. However, this is logistically difficult to do and most of the faithful choose to go to confession once a month.
There is, of course, nothing wrong with this, for those who have committed only light sins (i.e., exceeded commandments God with little or no consciousness) can receive Holy Communion without fear. Quite simply, the sacrament of the Eucharist "erases" light sins.
Communion, on the other hand, cannot be received by those who have a serious or mortal sin on their conscience and have not received absolution. Grave sins include: not attending Mass, adultery, theft, idolatry, fraud, and the occult. Mortal sins, on the other hand, as the name suggests, refer to depriving someone of life.