J. Sheridan Le Fanu said this quote

How marvellously lie our anxieties, in filmy layers, one over the other! Take away that which has lain on the upper surface for so long—the care of cares—the only one, as it seemed to you, between your soul and the radiance of Heaven—and straight you find a new stratum there. As physical science tells us no fluid is without its skin, so does it seem with this fine medium of the soul, and these successive films of care that form upon its surface on mere contact with the upper air and light.