On the one hand is the brain, the most complex object in the known universe, a material thing subject to the laws of physics. On the
other hand is the world of awareness, of the sights and sounds of life, of fear and anger, of lust, love, and ennui.
These two worlds are closely related—as a stroke or a strong blow to the head demonstrates dramatical y. Oscar Wilde expressed it
poetical y, “It is in the brain that the poppy is red, that the apple is odorous, that the skylark sings.”