Communion Is Sacred
Luke 22:19 "And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me."
The bread of communion symbolizes the body of Jesus which was broken for us through His sufferings. He not only died for us on the cross but also bore 39 stripes on His back by which we are healed. Partaking of communion should remind us of the emotional and physical salvation that Jesus provided for us.
The Lord's Supper comes from a part of the Passover meal that was celebrated only once a year. However, the early Christian church took Communion weekly and sometimes daily. There is no specific frequency of the Lord's Supper prescribed in scripture.
As we take Communion, we are solemnly proclaiming the Lord's death, and our union with Him and with others through that death. This is a profession of our faith and therefore, there are serious consequences for those who profess something they don't possess.
It is most likely that what makes a person worthy or unworthy is whether or not he is born again. This is also totally consistent with the doctrine of grace that Paul constantly preached. There were unbelievers among the true Christians just as Jesus prophesied, and this still exists today. It is a dangerous offense for an unbeliever to take the Lord's Supper. When taking Communion, each person should examine himself to see whether or not he is in the faith (2 Cor. 13:5).