an equation for rainbows:
he invented analytic geometry
and applied it to beauty.
but no more touchable and
Descartes thought and so he existed: cogito ergo sum.
He willed himself to be tangible
so he could write equations for untouchable things,
like the hues between raindrops and the sun.
about the mind-body dichotomy, duality:
a body is a machine,
we age, we die;
but the mind has no such natural laws
so we see beauty in rainbows.
Image: Susanne Nilsson