What does Psalm 133 teach about the nature of unity?

Psalm 133 provides a vivid metaphor for the nature of unity, comparing it to the 'precious ointment' upon Aaron's head that flows down to his beard and garments. This imagery illustrates the abundance and richness of the unity that God desires among His people. The oil signifies anointing and blessing, suggesting that unity is a divinely bestowed gift that brings nourishment and vitality to the community. Additionally, the comparison to dew on the mountains emphasizes the refreshing and life-giving qualities of unity, which fosters an environment of peace and harmony among believers. Ultimately, unity is both a gift from God and a reflection of our shared identity in Christ, calling us to actively pursue and protect it.