“The sinner must feel far worse before he ever has a right to feel any better.”

Source: Vampire Academy

Letter to the Marquis de Lafayette (25 July 1785)
1780s

Source: He's Just Not That Into You: The No-Excuses Truth to Understanding Guys

Letter to Colette O'Niel, October 23, 1916; published in The Selected Letters of Bertrand Russell: The Public Years, 1914-1970, p. 87
1910s

Cada vez que leo algo que han escrito contra mi, no sólo comparto el sentimiento sino que pienso que yo mismo podría hacer mejor el trabajo, quizá debería aconsejar a los aspirantes a enemigos que me envíen sus criticas de antemano, con la seguridad de que recibirán toda mi ayuda y mi apoyo. Hasta he deseado secretamente escribir con seudónimo, una larga invectiva contra mí mismo.
"Jorge Luis Borges visto por él mismo" http://www.diariomedico.com/entorno/ent271299com.html (Jorge Luis Borges seen by himself) In the case of this work, the Spanish version seems to have been published after the English version.
Autobiographical Notes (1970)
Context: Any time something is written against me, I not only share the sentiment but feel I could do the job far better myself. Perhaps I should advise would-be enemies to send me their grievances beforehand, with full assurance that they will receive my every aid and support. I have even secretly longed to write, under a pen name, a merciless tirade against myself.

When asked if he considers himself to be a pessimist and a cynic ** Interview with Request Magazine, October 1994 http://web.stargate.net/soundgarden/articles/request_10-94.shtml,
Soundgarden Era