Why is it important for brothers and sisters in Christ to dwell together in Christian unity?

How is it good for brothers and sisters in Christ to dwell together in unity?  In what sense is Christian unity objectively good?

How is it pleasant for brothers and sisters in Christ to dwell together in unity?  In what sense is Christian unity experientially pleasant?

What are the two images that David uses to illustrate the unity that God calls for among his people?

What are some dangers that the church is at risk of if it neglects (or refuses) to pursue unity within itself?

How does disunity in the church undermine the church’s witness in the world?  How does it bring reproach on the name of Christ?

What are the eschatological implications of unity within the body of Christ?  When the church is united together around the gospel of Christ, how does that point forward to the eternal realities of heaven?

In 133:2, David likens unity among the people of God to the ordination of priests in Israel with oil (which was done to set them apart to serve God).  How does Christian unity set the church apart to serve God, and to go about the Great Commission?