“I can't count the men who have tried to seduce me away from my virtue by teaching me how to defend it.”

Thoughts and Aphorisms (1913), Bhakti

Garantissez-moi de mes amis, écrivait Gourville proscrit et fugitif, je saurai me défendre de mes ennemis. ("Defend me from my friends," wrote Gourville, exile and fugitive, "I can defend myself from my enemies.") — Gabriel Sénac de Meilhan, Considérations sur l'esprit et les moeurs (1788): "De L'Amitié." Sénac de Meilhan was quoting Jean Hérault, sieur de Gourville (1625 - 1703).
The remark has often been attributed to Voltaire and to Claude-Louis-Hector de Villars.
Misattributed

Maurice in “Characters,” p. 298
Pretexts: Reflections on Literature and Morality (1964)
Context: In my present insistence on high standards you will see that there is less self-indulgence than resolve and application. I do not let the Christian monopolize the ideal of perfection. I have my own virtue, which I am constantly cultivating and refining by teaching myself not to tolerate in me or my surroundings anything but the exquisite.

Source: The Immoralist

Source: A Sincere Admonition to All Christians to Guard Against Insurrection and Rebellion (1522), p. 65

The Scott Clifton Interview – The Bold and the Beautiful, as quoted by Michael Fairman, hosted on Michaelfairmansoaps.com (20 September 2010) http://michaelfairmansoaps.com/the-bold-and-the-beautiful/the-scott-clifton-interview-the-bold-and-the-beautiful/2010/09/20/

"Vertigo"
Lyrics, How to Dismantle an Atomic Bomb (2004)

Cookie Jar.
Song lyrics, On and On (2003)