God uses broken things.
It takes broken soil to produce a crop,
broken clouds to give rain,
broken grain to give bread,
broken bread to give strength.
It is the broken alabaster box that gives forth perfume.
~Vance Havner

And I might add:
a snail wandering into sidewalk foot traffic,
crushed, cracked and dying, clinging to the pavement,
its broken shell a gift of metaphor
of our own leaking brokenness.