By raining down fire and brimstone upon the cities of Sodom and Gomorrah, God not only demonstrated how He felt about overt sin, but He also launched an enduring metaphor. After the events of Genesis 19:24, the mere mention of fire, brimstone, Sodom or Gomorrah instantly transports a reader into the context of God’s judgment.Such an emotionally potent symbol, however, has trouble escaping its own gravity. This fiery image can impede, rather than advance, its purpose. A symbol should show a similarity between two dissimilar entities. Fire and brimstone describes some of what hell is like—but not all of what hell is.
The word the Bible uses to describe a burning hell—Gehenna—comes from an actual burning place, the valley of Gehenna adjacent to Jerusalem on the south. Gehenna is an English transliteration of the Greek form of an Aramaic word, which is derived from the Hebrew phrase “the Valley of (the son[s] of) Hinnom.”
In one of their greatest apostasies, the Jews (especially under kings Ahaz and Manasseh) passed their children through the fires in sacrifice to the god Molech in that very valley (2 Kings 16:3; 2 Chronicles 33:6; Jeremiah 32:35). Eventually, the Jews considered that location to be ritually unclean (2 Kings 23:10), and they defiled it all the more by casting the bodies of criminals into its smoldering heaps. In Jesus’ time this was a place of constant fire, but more so, it was a refuse heap, the last stop for all items judged by men to be worthless.
When Jesus spoke of Gehenna hell, He was speaking of the city dump of all eternity. Yes, fire was part of it, but the purposeful casting away—the separation and loss—was all of it.