“It is a strange, nonintuitive fact of existence that photons of light have no color, sound waves no sound, olfactory molecules no odors.

As James Le Fanu has put it, “While we have the overwhelming impression that the greenness of the trees and the blueness of the sky are streaming through our eyes as through an open window, yet the particles of light impacting on the retina are colourless, just as the waves of sound impacting on the eardrum are silent and scent molecules have no smell. They are all invisible, weightless, subatomic particles of matter travelling through space.”

All the richness of life is created inside your head. What you see is not what is but what your brain tells you it is, and that’s not the same thing at all.”