The connection between 6:13 and 7:2 has led many scholars to think that 6:14–7:1 might be an inserted fragment from another letter, possibly the one mentioned in 1 Corinthians 5:9. However, this section could also be a digression in Paul's writing, challenging the Corinthians to stop opposing him and his message. Paul wanted to restore relationships, and here he describes believers in Christ as forming a holy temple. Believers' identity as the temple of God encourages harmony among them and separation from the impurity of unbelieving attitudes and behaviors. Paul contrasts Christian and pagan morality using quotations from the Old Testament.