If you have your Bibles, I'd invite you to turn with me to Psalm 133. Psalm 133 has been sung at Presbyterian General Assembly for probably close to five hundred years now and if you've ever been to a Presbyterian General Assembly you’ll know why it needs to be sung there because unity is not something that Presbyterians are known for at their General Assembly. It used to be said that if the Scots couldn't find somebody to fight they’d fight one another and that national characteristic has apparently followed Presbyterians historically over the decades and centuries. But perhaps in faith and as an ideal, typically our General Assembly closes every year — it will be next week in Louisville, Kentucky — with the singing of this psalm in a metrical version, an aspiration…