The world is but a perennial movement. All things in it are in constant motion-the earth, the rocks of the Caucasus, the pyramids of Egypt-both with the common motion and with their own.
Michel de MontaigneIt is a thorny undertaking, and more so than it seems, to follow a movement so wandering as that of our mind, to penetrate the opaque depths of its innermost folds, to pick out and immobilize the innumerable flutterings that agitate it.
Michel de Montaigne