In today's Morning Prayer reading from Phyllis Tickle's Divine Hours book, the Refrain was this verse from Psalm 27:5.
One thing I have asked of the LORD; one thing I seek, that I may dwell in the house of the LORD all the days of my life.
There is an old Vineyard worship song by Andy Park based on this verse. The Lord drew me back to that song today.
One thing I ask, one thing I seek