I was exposed to this hymn written by John Newton on the Challies blog.

Though I grew up in a tradition where hymns were the dominant form of congregational signing, I don’t think I had heard this one before.

Having read the words I was intriguer to hear it song.
I found it on the iGrace music online hymnal (for those who want the music they have the piano and guitar music available to print).
And a rendition on YouTube (below).

Before watching the video, ponder the words.

Approach, My Soul, the Mercy Seat

words by John Newton
based on Ps. 32:5-7

Chorus: Approach, my soul, the mercy seat,
Where Jesus answers prayer; 
There humbly fall before His feet, 
For none can perish there.

1. Thy promise is my only plea, 
With this I venture nigh; 
Thou callest burdened souls to Thee 
And such, O Lord, am I.

2. Bowed down beneath a load of sin, 
By Satan sorely pressed, 
By wars without and fears within,
I come to Thee for rest.

3. Be Thou my shield and hiding place, 
That, sheltered near Thy side,
I may my fierce accuser face, 
And tell him Thou hast died!

4. O wondrous love! To bleed and die, 
To bear the cross and shame,
That guilty sinners, such as I, 
Might plead Thy gracious name!

©1998 Kevin Twit Music.
Used by permission. All rights reserved.

Additional Verses
courtesy of Michael Lyman

5. “Poor tempest-toss-ed soul, be still;
My promised grace receive;
I’ll work in thee both power and will;
Thou shalt in me believe.”