The answer
The believer should examine his conscience before God and purify it through repentance. The Apostle says, “Therefore whoever eats this bread or drinks this cup of the Lord in an unworthy manner will be guilty of the body and blood of the Lord. But let a man examine himself, and so let him eat of the bread and drink of the cup. For he who eats and drinks in an unworthy manner eats and drinks judgement to himself, not discerning the Lord's body” (1 Cor. 11:27–29).
Fr. Tadros Yacoub Malaty