Examine yourself, and only then eat of the Bread and drink of the Cup. For all who eat and drink without discerning the Body, eat and drink judgment against themselves.” (Cor.11:27-9). Hence, let us receive Holy Communion with fervent love and respect – not merely as a matter of routine.
St Paul is speaking also of the Mystical Body of Christ, i.e. the people of God gathered at the altar. Such a union, plainly, means that our outward piety towards the consecrated Bread and Wine cannot coexist with rudeness, unkindness, slander, cruelty, gossiping or any other breach of charity toward our brothers and sisters.