Foot Prints: a touching poem

One night I had a dream. I dreamed I was walking along the beach with God and across the sky flashed scenes from my life. For each scene I noticed two sets of footprints in the sand. One belonged to me and the other to God.
When the last scene of my life flashed before us I looked back at the footprints in the sand. I noticed that many times along the path of my life there was only one set of footprints. I also noticed that it happened at the very lowest and saddest times in my life.

This really bothered me and I questioned God about it. "God, you said that once I decided to open my heart to you, you would walk with me all the way. But I noticed that during the most troublesome times in my life, there was only one set of footprints. I don't understand why, in times when I needed you most, you should leave me."
Then God replied, "My precious, precious child. I love you and I would never, ever leave you during your times of trial and suffering. When you saw only one set of footprints, it was then that I carried you!"