Tydi a roddaist liw i'r wawr

Tydi, a roddaist liw i'r wawr
  A hud i'r machlud mwyn,
Tydi, a luniaist
    gerdd a sawr
  Y gwanwyn yn y llwyn,
O cadw ni rhag colli'r hud
Sydd heddiw'n crwydro
    drwy'r holl fyd.

Tydi, a luniaist gân i'r nant,
  A'i su i'r goedwig werdd,
Tydi, a roist i'r awel dant
  Ac i'r ehedydd gerdd,
O cadw ni rhag dyfod dydd
Na yrr ein calon gân yn rhydd.

Tydi, a glywaist lithriad traed
  Ar ffordd Calfaria gynt,
Tydi, a welaist ddafnau gwaed
  Y Gwr ar ddieithr hynt,
O cadw ni rhag dyfod oes
Heb goron ddrain
    na chur na chroes.
      Amen, Amen, Amen, Amen.

Thou, who gavest colour to the dawn
  And charm to the pleasant sunset,
Thou, who didst design
    the poetry and savour
  Of the Spring in the grove,
O keep us from losing the charm
Which today is wandering
    throughout all the world.

Thou, who didst design a song for the brook,
  And its whisper for the green forest,
Thou, who gavest to the breeze a string
  And to the lark a verse,
O keep us from the coming of the day
When our heart fails to set a song free.

Thou, who didst hear the stumbling of feet
  On Calvary's road of old,
Thou, who didst see the drops of blood
  Of the Man on a strange course,
O keep us from the coming of an age
Without a crown of thorns
    or wound or cross.
      Amen, Amen, Amen, Amen.

O Thou, who dawn thy palette lent
  And sunset's golden spell,
O Thou, who fashioned
    song and scent
  And springtime in the dell,
O grant that we may never lose
The magic which thy
    world imbues.

O Thou, who taught the brook to sing
  With sighs the wood dost fill,
O Thou, who plucked the breeze's string
  And gave the lark its trill,
O never let the day arrive
When we sing not to be alive.

O Thou, who heard the feet that slipped
  On Calvary's stony road,
O Thou, who saw the blood that dripped
  Beneath his cruel load.
O keep us, lest a day should dawn
Without the cross,
    or stripes, or thorn.
      Amen, Amen, Amen, Amen.

also:
O Lord who gave the dawn its glow
Raymond Williams