How should the priest and the congregation feel while receiving holy communion?

The eucharist is a medicine for the priests and people, who are all counted as sick. Whoever does not feel his sickness is not worthy to receive communion. St. Philoxenus of Mabbug says, “For this reason, when [the priest] distributes the Mysteries to them, he cries out ‘the Body of God for the forgiveness of sins, and the Blood of the Son of God for the propitiation of wrongs,’ recalling by these words what our Lord said to his disciples when he distributed his Mysteries to them: This is my body which is broken for you for the forgiveness of sins, and this is my Blood which is shed for you for forgiveness (Matt. 26:26–28). Thus it is that when we approach the Mysteries of our Savior, we approach as needy sinners; for there is no need for medicine except in the case of an illness, or for healing except when someone is sick. For it is not the healthy who are in need of a doctor, but those who are ill (Matt. 9:12). It is evident, then, that everyone who approaches the Mysteries receives them for the forgiveness of his sins, whether it be the priest or the people. And if the Holy Spirit is not within us because we are sinners, by what authority does the priest invoke the spirit, or the people approach the Mysteries?”¹⁵⁶⁹