571. Because the lust of doing the evils that are from the love of self and of the world is meant by "infernal fire", and because such is the lust of all in the hells (as shown in the foregoing section) therefore also when the hells are opened there is an appearance of fire with smoke, such as is seen in conflagrations, a dense fire from the hells where the love of self reigns, and a flaming fire from the hells where love of the world reigns. When, however, the hells are closed, this fiery appearance is not seen, but in its place there is a kind of obscurity like the condensation from smoke; yet the fire still rages within, as can be seen by the heat exhaling therefrom, which is like the heat from the burnt ruins after a fire, and in some places like the heat from a heated furnace, in others like the heat from a hot bath. When this heat inflows with man it excites lusts in him, and with evil men hatred and revenge, and with the sick insanities. They who are in the above-mentioned loves have such a fire or such a heat since as to their spirit they are attached to those hells, even while living in the body. But it ought to be known that those who are in the hells are not in fire; the fire is an appearance. Those there are conscious of no burning, but only of a warmth like that which they had felt when in the world. This appearance of fire is from correspondence, for love corresponds to fire, and all the things seen in the spiritual world are seen in accordance with correspondences.