In his message, "The Invisible Sin That Destroys Intimacy with God," John Bevere identifies the dangerous, unseen sin of tolerating compromise. Based on Jesus's message to the church in Pergamum (Revelation 2:12–17), Bevere explains that this is not about intentionally practicing evil but about passively allowing sin to persist and influence the church. 

The invisible sin: Tolerating compromise
Bevere argues that this "invisible sin" is a casual acceptance of worldly influences that go against God's will. 
The church in Pergamum: Located in a city filled with pagan worship, the church in Pergamum was commended by Jesus for holding fast to their faith in a difficult environment.

The rebuke: However, Jesus rebuked them for tolerating false teachers within their midst. The toleration of these teachers, who promoted idolatry and sexual immorality, was more dangerous than the external persecution they faced.

The danger of tolerance: According to Bevere, this toleration of compromise is the invisible sin. By allowing it to exist, believers open the door to sin and idolatry, which will ultimately destroy intimacy with God. 

Key takeaways from the message
Confront rather than tolerate: The message challenges believers to confront what is not aligned with God's will rather than tolerating it out of fear, comfort, or a desire to avoid conflict.
Strengthen your faith: Confronting compromise and standing firm in the truth strengthens one's faith and relationship with God.
The cost of compromise: Tolerating compromise, even "invisible" or less overt forms, will eventually lead to a decline in spiritual health and intimacy with God. Jesus's warning to Pergamum is a call to repent and take action.