Perfumes are the feelings of flowers, and as the human heart, imagining itself alone and unwatched, feels most deeply in the night-time, so seems it as if the flowers, in musing modesty, await the mantling eventide ere they give themselves up wholly to feeling, and breathe forth their sweetest odours. Flow forth, ye perfumes of my heart, and seek beyond these mountains the dear one of my dreams! ~Heinrich Heine, "The Hartz Journey" (1824)
