“Whenever I make an exchange freely, and without constraint, it is because I desire the thing I receive more than that I give; and, on the contrary, he with whom I bargain desires what I offer more than that which he renders me.”
Antoine Louis Claude Destutt, comte de Tracy, A Treatise on Political Economy (Georgetown, D.C.: Joseph Mulligan, publisher; W. A. Rind & Co., printer, 1817) Thomas Jefferson, ed. of translation, from the section entitled “The First Part of the Treatise on the Will and Its Effects: Of Our Action,” p. 8.