How do you tune a bowl? (MC Richards - Centering)

Oftentimes I put quotes up here from my reading that I'd like to keep around for later.  M.C. Richards book, Centering, would require me to transcribe every page.  So instead, I'll put up this brief thought on ceramics.

I realized watching this that combining sound and ceramics is a genius idea.  Resonance provides a completely different and legitimate way of understanding a given piece's integrity, wholeness, composition, structure, tone.  What a brilliant way of expressing the invisible.