This sermon examines the theological meaning of delivering a believer to Satan as a form of church discipline, rooted in 1 Corinthians 5. It distinguishes between struggling with sin and persisting in unrepentant, unacknowledged offenses such as fornication, covetousness, and heresy, which require exclusion from the fellowship. The teaching contrasts the spiritual protection found within the church, described as a hedge of God's care, with the domain of Satan, where the excluded individual is left vulnerable to spiritual attack. This discipline is presented not as an act of malice but as a necessary measure to protect the congregation from corruption and to prompt the offender toward repentance and restoration. The sermon emphasizes that the ultimate goal of such severe measures is the salvation of the spirit and the preservation of the church's purity.