How does the Bible instruct us to maintain unity?

In Ephesians 4:1-3, Paul exhorts believers to 'walk worthy' of their calling with humility and gentleness. This means exercising lowliness, meekness, and patience, bearing with one another in love. The initiative for maintaining unity requires effort ('endeavoring to keep the unity of the Spirit in the bond of peace'), indicating that unity does not occur naturally or without diligence. By demonstrating Christ-like love and humility, Christians can effectively preserve and deepen their unity in the faith.