Do you have those moments when you have a picture that comes from nowhere and is stuck in your head for days? I have one that did just that to me last week.
A picture of a mold and sand, or light colored dirt. When you tilted the mold, the sand fell out in a pile of nothing.
Put the sand back in the mold and add water and tilt it and a form comes out.
The sand was us, the water God. Add God to us and He forms us into the mold He wants. Pure water. And dust.