Unity in the Church

Psalm 133:1-3
Behold, how good and how pleasant it is for brethren to dwell together in unity! It is like the precious oil upon the head, running down on the beard, the beard of Aaron, running down on the edge of his garments. It is like the dew of Hermon, descending upon the mountains of Zion; for there the Lord commanded the blessing—life forevermore.