“Thirty spokes meet in the hub,
but the empty space between them
is the essence of the wheel.”
comment — Sometimes we really need to think in reversals, or opposites. A bowl is not its material form, but the space that material form allows for its function. Taoism in general is always useful as a reference point in tactics and strategy: stepping back and seeing the reverse of what is obvious, and thus getting closer to the real essence of the thing in itself.