How do we know unity is important for Christians?

In Scripture, particularly Psalm 133, unity among believers is depicted as both good and pleasant. This unity signifies the harmony that arises from God's grace and is crucial for the Church's witness to the world. In Ephesians 4, the apostle Paul emphasizes that maintaining unity is a part of walking worthy of the calling we have received, showcasing a collective identity that mirrors God's love. Thus, unity is vital not just for personal relationships but for the authentic presentation of the Gospel.