During a turbulent period of my own life several years ago, and before I had found my way fully back to the Lord, I used to flip through that hymnal, singing every hymn whose tune I could still remember. This hymn nearly always made me cry.
YouTube video "Come, Thou Fount of Every Blessing"
Written by Robert Robinson (1735-1790)
Performed by Lindsy Morton and Joseph Schlegel
The story and full lyrics of the hymn can be found here. (Sorry, I couldn't locate any information about the performers.)