"Today I begin to understand what love must be, if it exists. . . . When we are parted, we each feel the lack of the other half of ourselves. We are incomplete like a book in two volumes of which the first has been lost. That is what I imagine love to be: incompleteness in absence". Edmond de Goncourt (1822-96) and Jules de Goncourt (1830-70), French writers. The Goncourt Journals (1888-96; repr. in Pages from the Goncourt Journal, ed. by Robert Baldick, 1962), entry for 15 Nov. 1859.