La Boétie, Étienne de’s Mesnagerie de Xénophon
In the Essays of Michel de Montaigne

• Book 1 · Chapter 14 · ¶ 21
  That the Taste of Good and Bad Things Depends Mostly on the Opinion We Have of Them
• Book 2 · Chapter 12 · ¶ 230
  Apology for Raymond Sebond