The Footprints of God

This has been hanging on my Grandma's wall in a frame my whole life. I just barely read it today!

In the deepest sleep one night I dreamed
That on the beach I walked.
God was by my side each step
And quietly we talked.
Then on the sky my life was flashed;
The visions all serene.
Two sets of footprints in the sand
Were there in ever scene.
But then I noticed in some scenes
Of suffering,pain,and strife.
Just a single set of footprints
At the worst times of my life.
'God, you said you'd stay by me
In good times and in bad....
Why then did you leave me
Each time my life was sad?"
"My precious child," God answered,
"When your life had pain, I knew;
The single set of footprints
Were the times I carried you."