Do you think I take any pleasure in this dog's life, in seeing and causing death in people unknown to me, in losing friends and acquaintances daily, in seeing my reputation ceaselessly exposed to the caprices of fortune, in spending the whole year with uneasiness and apprehension, in continually risking my life and my fortune? I certainly know the value of tranquility, the charms of society, the pleasures of life, and I like to be happy as much as anybody. Although I desire all these good things, I will not buy them with baseness and infamy. Philosophy teaches us to do our duty, to serve our country faithfully at the expense of our blood and of our repose, to commit our whole being to it.

Letters of Voltaire and Frederick the Great (New York: Brentano's, 1927), trans. Richard Aldington, letter 141 from Frederick to Voltaire (1759-07-02)