There are some things I may not know there are some places I can't go
But I am sure of this one thing my God is real for I can feel him in my soul
My god is real real in my soul my God is real for he has washed and made me whole
His love for me is like pure gold my God is real for I can feel him in my soul

Some folks may doubt some folks may scorn
Well they can all go on just leave me alone
But as for me I'll take God's part my God is real for I can feel him in my heart
My god is real real...

There is also another verse... (although not necessarily sung by Johnny Cash)
I cannot tell just how you felt when Jesus took your sins away
But since that day - yes since that hour
God has been real for I can feel His holy power