What does the Bible say about how to behave in the church?

In 1 Timothy 3:14-15, Paul instructs about behavior in the church by emphasizing its nature as the house of God, where believers gather as an assembly. Knowing the church's purpose helps believers understand how to behave accordingly. First, believers should act humbly, recognizing that their calling is by God's grace and not from their own merit. Secondly, they should act selflessly, prioritizing the needs of the church assembly over personal desires. Lastly, behavior in the church should be rooted in faith, relying fully on Christ and adhering to His teachings.