Hymn 567 in the Lutheran Service Book was written by a Free Kirk Presbyterian by the name of Horatius Bonar. (This hymn is a great expression of the doctrine of justification which was taught by the Reformation, and hardly recognizable when compared to the Pelagian love songs one shudders at today. It’s strange how the meaning of ‘Free Church’ changed from being more to less loyal to the Reformation than the established churches.) 
“Not what these hands have done Can save this guilty soul;
Not what this toiling flesh has borne Can make my spirit whole.
Not what I feel or do Can give me peace with God;
Not all my prayers and sighs and tears Can bear my awful load.
Thy work alone O Christ, Can ease this weight of sin;
Thy blood alone, O Lamb of God, Can give me peace within.
Thy love to me, O God, Not mine, O Lord, to Thee,
Can rid me of this dark unrest And set my spirit free.
Thy grace alone, O God, To me can pardon speak;
Thy pow’r alone, O Son of God, Can this sore bondage break.
I bless the Christ of God, I rest on love divine,
And with unfalt’ring lip and heart I call this Savior mine.”