I do think, half of what we call madness is just some poor slob dealing with pain by a strategy that annoys the people around him.
Nothing could be more absurd than moral lessons at such a moment! Oh, self-satisfied people: with what proud self-satisfaction such babblers are ready to utter their pronouncements! If they only knew to what degree I myself understand all the loathsomeness of my present condition, they wouldn't have the heart to teach me.