From the Vatican Information Service:
Benedict XVI emphasized that the Christ we encounter in the Sacrament of the Eucharist "is the one and same Christ present in the Eucharistic bread all over the world. This means we can encounter Him only together with everyone else. We can only receive Him in unity."
"The consequence of this is clear," he went on, "we cannot communicate with the Lord if we do not communicate with one another. ... For this it is necessary to learn the great lesson of forgiveness: do not let resentment gnaw at the soul, but open your hearts to the magnanimity of listening to others."