"At this the duchess, laughing all the while, said: "Sancho Panza is right in all he has said, and will be right in all he shall say... - Miguel de Cervantes

In short, our gentleman became so caught up in reading that he spent his nights reading from dusk till dawn and his days reading from sunrise to sunset, and so with too little sleep and too much reading his brains dried up, causing him to lose his mind.

Es de vidrio la mujer; pero no se ha de probar si se puede o no quebrar, porque todo podría ser. Y es más fácil el quebrarse, y no es cordura ponerse a peligro de romperse lo que no puede soldarse. Y en esta opinión estén todos, y en razón la fundo: que si hay Dánaes en el mundo, hay pluvias de oro también.

Sancho tried to amuse him and cheer him up by chatting to him, and said, among other things, what is recorded in the next chapter.