If this is the correct hymn, the title is:
Thy Mercy My God
Lyrics John Stocker / Music Sandra McCracken

1 Thy mercy, my God, is the theme of my song,
The joy of my heart and the boast of my tongue;
Thy free grace alone, from the first to the last,
Hath won my affections and bound my soul fast.

2 Without thy free mercy I could not live here
Sin soon would reduce me to utter despair;
But, through thy free goodness, my spirits revive,
And he that first made me, still keeps me alive.

3 Thy mercy surpasses the sin of my heart
Which wonders to feel its own hardness depart,
Dissolved by thy goodness, I fall to the ground
And weep to the praise of the mercy I found.

4 The door of thy mercy stands open all day
to the needy and poor, who knock by the way;
No sinner shall ever be empty sent back,
Who comes seeking mercy for Jesus' dear sake.

5 Thy mercy in Jesus exempts me from hell;
Its glories I'll sing, and its wonders I'll tell:
'Twas Jesus the friend when he hung on the tree
That opened the channel of mercy for me.

6 Great Father of mercies, thy goodness I own,
And covenant love of thy crucified son:
All praise to the spirit, whose action divine
Seals mercy and pardon and righteousness mine.

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