Mae arnaf eisiau calon bur

Mae arnaf eisiau calon bur,
  Eiddigus, dduwiol, dda,
I wrthwynebu pechod, pan
  I'm drygu nesu wna.






N'ad imi mwyach, tra f'wy' byw,
  Lân Ysbryd Duw dristâu;
Ond bydded i'm cydwybod fod
  Yn dyner i barhau.






Os troi i'r dde neu'r aswy wna',
  O argyhoedda'n llym;
A boed im' wylo dagrau dwys,
  Heb fod gorphwysfa im'!

Y trosedd lleiaf, pared boen
  I'm henaid, O fy Nuw;
A throer fi eilwaith at y gwaed
  Sy'n gwneyd y marw'n fyw.

I want a pure heart,
  Jealous, divine, good,
To resist sin, when
  To harm me it does draw near.






No more for me, while I live,
  The Holy Spirit of God to sadden:
But may my conscience be
  Tender continuously.






If turn to the right or the left I do,
  O convince sharply!
And may it be that I cry deep tears,
  Without there being rest for me!

The least transgression, let pain persist
  To my soul, O my God;
And let me be turned again to the blood
  Which makes the dead alive.

I want a principle within
  Of jealous, godly fear,
A sensibility of sin,
  A pain to feel it near.

I want the first approach to feel
  Of pride, or fond desire,
To catch the wandering of my will,
  And quench the kindling fire.

That I from thee no more may part,
  No more thy goodness grieve,
The filial awe, the fleshly heart,
  The tender conscience, give.

Quick as the apple of an eye,
  O God, my conscience make!
Awake my soul, when sin is nigh,
  And keep it still awake.

If to the right or left I stray,
  That moment, Lord, reprove;
And let me weep my life away,
  For having grieved thy love.

O may the least omission pain
  My well-instructed soul,
And drive me to the blood again
  Which makes the wounded whole!