It's true,' replied Doris with a sniff in Bessy's direction to make her sensible of a victory, even if a minor one. 'It is amazing how so many people go insane. One day a man is a normal, friendly husband and the next he suddenly becomes a raging schizoid and slays his wife and himself as well. The result of what cause? Why, perhaps he chanced to find some schoolgirl treasure of another beau who had been his greatest rival and is stunned to discover that she secretly retains this. But usually the matter is not so simple, you know. Next to nothing may happen, jarring awake some sleeping monstrosity in a man's complex mental machinery and turning him from a sane person to a mentally sick individual. It is wholly impossible to say when a man is sane, for' -she tittered- 'scarce one of us is normal.''You mean - it might happen to any of us?''Of course,' said Doris, charmed by all this interest. 'One moment we are seated here, behaving normally and the next some tiny thing, a certain voice, a certain combination of thoughts may throw out the balance wheel of our intellects and we become potential inmates for asylums the rest of our lives. No, not one of us knows when the world will cease to be a normal, ordinary place. You know, no one ever knows when he goes insane: He supposes it is the world altering, not himself. Rooms become peopled with strange shapes and beings, sounds distort themselves into awful cries and, poof! we are judged insane.''Poof -' said Jacob, feeling weak and ill.(He Didn't Like Cats)
~ L. Ron Hubbard