Thanks for that link, Burke.  In case the link to Olney Hymns disappears (as some other of the above links have), here are the six original verses to John Newton's poem, as published in the Olney Hmnal:

Amazing Grace 
from Olney Hymns 1779  Lyrics: John Newton

Amazing grace! (how sweet the sound)
That saved a wretch like me!
I once was lost, hut now am found,
Was blind, but now I see.

'Twas grace that taught my heart to fear,
And grace my fears relieved;
How precious did that grace appear
The hour I first believed!

Through many dangers, toils and snares,
I have already come;
'Tis grace has brought me safe thus far,
And grace will lead me home.

The Lord has promised good to me,
His word my hope secures;
He will my shield and portion be,
As long as life endures.

Yes, when this flesh and heart shall fail,
And mortal life shall cease,
I shall possess, within the veil,
A life of joy and peace.

The earth shall soon dissolve like snow,
The sun forbear to shine;
But God, who called me here below,
Will be for ever mine.