The exact science of one molecule transformed into another -- that Mabel could not explain, but then again she couldn't explain how a fetus formed in the womb, cells becoming beating heart and hoping soul. She could not fathom the hexagonal miracle of snowflakes formed from clouds, crystallized fern and feather that tumble down to light on a coat sleeve, white stars melting even as they strike. How did such force and beauty come to be in something so small and fleeting and unknowable?