An 18th century Calvinistic Methodist, John Evans from Cilycwm, Wales, “was prone to depression. Once, he and Dafydd Morris were on a journey in Anglesey and preaching at Cerriglleithir, the home of Sion Roland. After the service, John Evans was very uncommunicative. He sat, in a depressed slump by the fire at one end of the room, with Dafydd Morris and Sion Roland. At the other end of the room were a group of girls who started singing the following verses:

On seeing my failures and follies
I judged that I labored in vain;
And thought that all praising and worship
Could wait until heaven was gained.

But when I can see your face shining
My soul must continually sing;
It soars from the snare of the fowlers,
And from its deep prison takes wing.

The singing stirred John Evans’ spirit; he went to the girls and joined with them. The verses were repeated time and again, and it was not long before the singing became praising, and the depressed preacher was the loudest in his praise.”

The Calvinistic Methodist Fathers of Wales, vol. 2, pp. 232-33.