"For anyone who eats or drinks without recognizing the body of the Lord eats and drinks judgment on himself." 1 Corinthians 11:29 NIV
This passage is in reference to the Lord's Supper (Communion or Eucharist). The Lord's Supper is an important part of the Christian faith through which we acknowledge Christ's sacrifice for us. We confess that we have sinned and need forgiveness, and we thank Jesus for his gift of salvation by his death on the Cross. If someone participates in Communion in a flippant way, not recognizing that Jesus is Lord, the Scripture tells us that person will experience some kind of judgment on them. The following verses mention sickness and even death as possible consequences. If someone is not sure of their standing with Christ, it is better for them to not participate in the Lord's Supper until they are sure of their devotion to Jesus. The Lord's Supper is a beautiful gift to the Church. For believers, it brings us closer to God and blesses us. However, for a non-believer it is not something to be trifled with.
Dear Jesus, thank you for your sacrifice on the Cross and for giving us a special way to remember it. Remind me to inspect my heart before I take your blessed gift. Let me be humble and approach you in a way that is worshipful and respectful.