Many social and political changes have swept the world clean of the apprehension of sacred things: the rejection of custom and ceremony; the conversion of marriage into a defeasible contract; the relaxing of the laws governing, sexual conduct and obscenity; the decline of faith and saintliness. As those changes take their effect, the experience of erotic love becomes darigerous and uncertain in its outcome. Our responsibility retreats further from the confused terrain of sexual experience, and threatens even to void it of desire. Hence, it might be said, my ability to reflect, in so neutral and philosophical a fashion, on the nature of this phenomenon is perhaps already an index of its decline: of the fact that desire does not, now, have the importance for us that formerly caused men to conceal it in poetry or overcome it through prayer. What we understand of our condition may also pass from us in the act of understanding. For we were never meant to have knowledge of this thing; we were meant only to be subject to its command. No phenomenon, perhaps, illustrates more profoundly the great poetical utterance of Hegel; that When philosophy paints its grey in grey, then has a shape of life grown old. By philosophy's grey in grey it cannot be rejuvenated but only understood. The owl of Minerva spreads its wings only with the gathering of the dusk. On the other hand, it is a century and a half since Hegel wrote those words, and life goes on.