What does the Bible say about fellowship in Christ?

The Bible, particularly in the writings of John, teaches that true fellowship occurs when believers abide in Christ and share a commitment to the truth of the gospel. John's epistles outline that fellowship isn't based on diverse beliefs but rather on a mutual embrace of the essential doctrines of Christ, including His nature and redemptive work. In 1 John, for instance, John identifies light, righteousness, and love as benchmarks for true fellowship, emphasizing that our communion with one another is derived from our shared relationship with the Father and the Son through the Holy Spirit's revelation.