We tend to think of "fruit" in two ways in natural language. One is as food that grows on trees and vines, sweet and delicious, and able to be eaten without harming the plant in any way. Another is as the things we produce, what our work yields for the betterment of the world. These are obviously connected: we are like trees, producing things that "feed" the world in some way, just as the tree produces fruit that feeds us. It makes sense, then, that the idea of fruit in the Bible is bound closely to the idea of goodness. Fruits that are eaten represent the desire for good and the energy to do what is good; fruit that is produced is the actual good that we go into the world and do.

422. And he opened the bottomless pit, and smoke arose out of the pit like the smoke of a great furnace. (9:2) This symbolizes falsities accompanying the lusts of the natural self springing from those people's evil loves.

The bottomless pit symbolizes the hell described just above in no. 421. The smoke from it symbolizes falsities arising from lusts, and because the smoke is said to be like that of a great furnace, it means falsities accompanying lusts springing from evil loves, inasmuch as fire symbolizes love (no. 468), and the fire of hell, evil love (no. 494). A great furnace has the same symbolism, since it smokes owing to fire.

Spirits of hell are not caught up in any material fire, but in a spiritual fire, which is the fire of their love. Consequently they do not feel any other fire. On this subject, see the book Heaven and Hell, nos. 134 566-575.

When any love is aroused in the spiritual world, it appears at a distance like fire - in the hells like a brightly burning fire, and outside the hells like the smoke of a conflagration or the smoke of a furnace.

Falsities accompanying lusts springing from evil loves are described also elsewhere in the Word by smoke from a fire or from a furnace or oven, as in the following places:

(Abraham) looked toward Sodom and Gomorrah..., and behold, the smoke of the land went up like the smoke of a furnace. (Genesis 19:28)

...the sun went down and it was dark, and behold, there appeared a smoking oven and a burning torch that passed between the pieces. (Genesis 15:17)

...they sin more and more... Therefore they shall be... like smoke from a flue. (Hosea 13:2-3)

...the wicked shall perish... In smoke they shall be consumed. (Psalms 37:20)

I will show wonders in heaven and on the earth: ...fire and pillars of smoke. (Joel 2:30)

(They) will cast (the evil) into the furnace of fire. There will be wailing and gnashing of teeth. (Matthew 13:41-42, 49-50)

And elsewhere.