519. The nature of people of this sort can be illustrated by comparisons. They are like churches with congregations of none but the spirits of the dragon, and the people meant in Revelation by locusts. They are also like pulpits in those churches where there is no Word, because it has been buried underfoot. They are like walls with beautifully coloured panelling, but with windows left open so that owls and ill-omened night-birds fly inside. They are like whitewashed tombs containing dead men's bones. They are like coins made out of dregs or dried dung plated with gold. They are like bark and bast surrounding rotting wood, or like the vestments of Aaron's sons on a leprous body; or rather, like ulcers full of pus covered by thin skin, so as to look as if healed. Is anyone unaware that a holy external and an unholy internal do not agree? Such people also are more than ordinarily afraid of examining themselves; so they are no more conscious of the rottenness in them than they are of the foul and stinking matter in their stomachs and bowels before being ejected into a lavatory.