This song is one of my favorite hymn, which I always love to use in encouraging people like me. Is is not amazing grace we got from Jesus christ that laid His life on the cross of calvary? 
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Let not His death be in vain for you and I, and that's why He commanded us to go into the world and preach His gospel! Matthew 28: 19 & 20
Amazing grace! How sweet the sound
That saved a wretch like me!
I once was lost, but 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 hath 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.
Yea, 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 forever mine.
When we’ve been there ten thousand years,
Bright shining as the sun,
We’ve no less days to sing God’s praise
Than when we’d first begun.
Song by John Newton.