Somehow this proves that you never know what you'll find at the mudcat. & here I am sitting up at with a cold cramping my breathing so much I can't sleep, & behold: a thread about this fine old lyric. Some years ago on a Sunday night here in the land of cactus & valley fever, so far removed from Wales that it's barely more than a distant echo of a place, I watched a remarkable man sit at piano & sing this one in his native tongue (and in English for us gringos) together with with other touching hymns & intimate recollections of the people and events which spawned them. He opened his heart to us that night; & now you've brought it all back to me. Someone dear to me was shaken up & bruised in an auto accident today & this lyric is just the comforter they need.