This is called “The great Welsh love-song.” It was written by Rev. William Rees, D.D., eminent as a preacher, poet, politician and essayist. One of the greatest names of nineteenth century Wales. He died in 1883.
The tune, “Cwynfan Prydian,” sung to this hymn is one of the old Welsh minors that would sound almost weird to our ears, but Welsh voices can sing with strange sweetness the Saviour's passion on which Christian hearts of that nation love so well to dwell, and the shadow of it, with His love shining through, creates the paradox of a joyful lament in many of their chorals. We cannot imitate it.
“RHYFEDDODAU DYDD YR ADGYFODIDD.”
Unnumbered are the marvels
The Last Great Day shall see,
With earth's poor storm-tossed children
From tribulation free,
All in their shining raiment
Transfigured, bright and brave,
Like to their Lord ascending