4418. They who are in the hells are said to be in darkness, but this is because they are in falsities; for as light corresponds to truth, so darkness corresponds to falsities. As already said, they are in a light like that from a charcoal fire and of a sulphurous yellow, and this light is what is meant by "darkness;" for according to their light, and consequently according to their sight from it, is their understanding, because the two things correspond to each other. It is called darkness also because these lights become darkness in the presence of heavenly light.