Hell-fire should so far exceed earthly fire in the intensity of its heat, there are several reasons which account for this fact.
In the first place, every one knows that the larger the fire, the greater the heat it throws out. The flame of a wax taper is not very hot, but if the whole taper is burning at once, the flame arising from it is much hotter. When a house is on fire, the heat in the immediate neighbourhood is very great, but if a whole village is in flames, the heat of the conflagration becomes unbearable even at a distance. If such be the effect produced by the fire of earth, which is comparatively but small in its extent, what will the action be of the fire of Hell, that is immeasurably greater than any conflagration seen upon earth!
Secondly, a fire that is enclosed in a furnace burns far more fiercely than if it were in the open air, because the heat being shut in cannot escape and diffuse itself, or be tempered by the surrounding air. If that is so, with what fury the flames of the huge furnace of Hell will rage, with what intensity they will glow! Suppose such a misfortune as a man being thrown into a lime-kiln, or a furnace heated to white heat how terrible would be his sufferings!
The next reason why the fire of Hell surpasses in intensity of heat all other fire is that it is kindled by the breath of God. For the prophet Isaias says: