5:13 it becomes visible. Paul assumes that certain sins are so shameful that bringing them to light will shame some non-believers into repentance. The Christians’ presence alone may expose sins through contrast or they may openly denounce them. Paul quotes what may be an early Christian hymn reminiscent of a number of Old Testament passages (e.g., Is. 60:1) and calling upon the spiritually dead to rise up and receive the light of Christ (cf. 2:1–10).