This article delves into the identification of 'unbelievers' as mentioned by Paul in 2 Corinthians 6:14, exploring the various groups this term could encompass in the context of the Corinthian church. It examines the historical, cultural, and theological aspects influencing Paul's admonition, including the challenges faced by the early Christian community amidst pagan Gentiles, non-believing Jews, and Christians engaging in Hellenistic practices. The article sheds light on the significance of maintaining Christian integrity and avoiding spiritual compromise in diverse societies.