"Therefore, whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord. A man ought to examine himself before he eats of the bread and drinks of the cup." -- 1 Corinthians 11:27-28
There are many physical maladies that need to be detected early. The best way to discover certain problems is to do a regular "self-examination". Along with such "self-exams" are those pesky annual physicals. Over the years I have received positive medical care due to these exams and always wondered why anyone would ignore such helpful procedures. I guess some people just figure "what you don't know won't hurt you".
Paul had a very different belief. He knew that unchecked sin leads to an unsafe life. The Lord's Table is to be approached with a prepared and cleansed heart. The bread and the cup are to be received in a worthy manner by an examined people. Careless and sinful living is not a lifestyle that will just be ignored over time. A "self-examination" is imperative because, "what we don't know can hurt us".
As we come to the communion table, we are reminded of our Lord's sacrifice to redeem us and set us apart as a people of God. Moments of examination bring us back to the basics of our relationship with the Lord. Take time to learn what may have broken your fellowship and pray with David, "Search me, O God, and know my heart; test me and know my anxious thoughts. See if there is any offensive way in me, and lead me in the way everlasting." (Psalm 139:23-24)
Think about this: "An humble knowledge of thyself is a surer way to God than a deep search after learning."
- Thomas à Kempis