Note 167 — Chapter IV · Genius and Insanity.

“One day I thought I heard very sweet harmonies in a dream. I awoke, and I found I had resolved the question of fevers: why some are lethal and others not—a question which had troubled me for twenty-five years” (De Somniis, c. iv.).

“In a dream there came to me the suggestion to write this book, divided into exactly twenty-one parts; and I experienced such pleasure in my condition and in the subtlety of these reasonings as I had never experienced before” (De Subtilitate, lib. xviii. p. 915).