I have seen mad people, and I have known some who have been quite intelligent, lucid, even clear-sighted in every concern of life, except on one point.
I ask myself whether I am mad. As I was walking just now in the sun by the river side, doubts as to my own sanity arose in me; not vague doubts such as I have had hitherto, but precise and absolute doubts. I have seen mad people, and I have known some who have been quite intelligent, lucid, even clear-sighted in every concern of life, except on one point. They spoke clearly, readily, profoundly on everything, when suddenly their thoughts struck upon the breakers of their madness and broke to pieces there, and were dispersed and foundered in that furious and terrible sea, full of bounding waves, fogs and squalls, which is called madness.
