Tesserae are tiny stones or pieces of glass cut to the desired shapes to use in mosaics. With the shimmer of reflected light, tesserae work together to create a sense of the hieratic, a Byzantine method of representation that gives the effect of the supernatural, dissolving matter and leaving the light of the spirit. The mosaics in the church of St. Mark’s in Venice use tesserae to form an interior space that is otherworldly.

My blood will transform into poison
From the tar, insomniac.
You have tired eyes, Child.
I’m starting to lose touch,
The concreteness of my world 
Fading to animation.
—Jack Vitek, "Living and Breathing"