The shutting of a door disturbed me, and, looking up, I found that my cousin had departed from the chamber. But from the disordered chamber of my brain, had not, alas! departed, and would not be driven away, the white and ghastly spectrum of the teeth. Not a speck on their surface — not a shade on their enamel — not an indenture in their edges — but what that brief period of her smile had sufficed to brand in upon my memory. I saw them now even more unequivocally than I beheld them then. The teeth! — the teeth! — they were here, and there, and everywhere, and visibly and palpably before me; long, narrow, and excessively white, with the pale lips writhing about them, as in the very moment of their first terrible development. Then came the full fury of my monomania, and I struggled in vain against its strange and irresistible influence. In the multiplied objects of the external world I had no thoughts but for the teeth. For these I longed with a frenzied desire. All other matters and all different interests became absorbed in their single contemplation. They — they alone were present to the mental eye, and they, in their sole individuality, became the essence of my mental life. I held them in every light. I turned them in every attitude. I surveyed their characteristics. I dwelt upon their peculiarities. I pondered upon their conformation. I mused upon the alteration in their nature. I shuddered as I assigned to them, in imagination, a sensitive and sentient power, and, even when unassisted by the lips, a capability of moral expression. Of Mademoiselle Salle it has been well said, “Que tous ses pas étaient des sentiments,” and of Berenice I more seriously believed que tous ses dents étaient des idées. Des idées! — ah, here was the idiotic thought that destroyed me! Des idées! — ah, therefore it was that I coveted them so madly! I felt that their possession could alone ever restore me to peace, in giving me back to reason.
Berenice, by Edgar A. Poe