Henry Miller said this quote

If this was the true self it was marvelous and what’s more it seemed never to change but always to pick up from the last stop, to continue in the same vein, a vein I had struck when I was a child and went down in the street for the first time alone and there frozen into the dirty ice of the gutter lay a dead cat, the first time I had looked at death and grasped it. From that moment I knew what it was to be isolated: every object, every living thing and every dead thing led its independent existence. My thoughts too led to an independent existence.