157, 158 and 159. As the whiteness of cloth is destroyed by its being covered with dirt, so let it be known that right faith is blurred by wrong belief. As the whiteness of cloth is destroyed by its being covered with dirt, so let it be known that right knowledge is destroyed, when clouded by nescience. As the whiteness of cloth is destroyed by it being covered with dirt, so let it be known that right conduct becomes perverted when vitiated by soul-soiling passions.