First, Gehenna was a literal place just outside of Jerusalem. Here is the Old Testament literal imagery that clearly informs the Gospels: “And they will go out and look on the dead bodies of those who rebelled against me; the worms that eat them will not die, the fire that burns them will not be quenched, and they will be loathsome to all mankind� (Isaiah 66).
Here, we see that the people are dead, but the fire endures forever as a reminder to mankind.
The picture of Gehenna as the place of punishment or destruction of the wicked occurs frequently in the Mishnah in Kiddushin 4.14, Avot 1.5; 5.19, 20, Tosefta t.Bere****h 6.15, and Babylonian Talmud b.Rosh Hashanah 16b:7a; b.Bere****h 28b. Gehenna is considered a Purgatory-like place where the wicked go to suffer until they have atoned for their sins. It is stated that the maximum amount of time a sinner can spend in Gehenna is one year, with the exception of five people who are there for all of eternity.
http://en.wikipedia.org/wiki/Gehenna
A website that I found particularly interesting was this one, for anyone who is actually interested in the topic:
http://tankrumblings.blogspot.com/20...l-gehenna.html
What is rarely noted is that Gehenna was used by the Rabbis of Jesus' day to reference the afterlife of sinners. Shammai and Hillel both used Gehenna to speak metaphorically of a place of purification of the soul for those who were not righteous enough to directly enter Paradise - the Garden of Eden. Shammai believed that only the extremenly righteous went to Paradise when they died; everyone else went to Gehenna. Most would rise to Ga Eden (Paradise) after being purified, having their sins burnt up - similar to the Catholic concept of Purgatory. Hillel taught that only the wicked went to Gehenna. Both Shammai and Hillel taught that the longest most people would stay in Gehenna was 11 months, and only the most wicked evil person would stay longer, possibly as much as 12 months. They debated as to what would happen to the especially wicked people, whether they too would be purified, annihilated, or endure the punishment of Gehenna indefinitely. They agreed though that most people, after being purified and healed by fire though, rose from the pit and were admitted to Paradise, the Garden of Eden!
According to the two dominant philosophies within Judaism for centuries before, during, and after Jesus' time, Gehenna was both purgative and remedial, as well as punitive. This would seem to account for the apparent inconsistency within the New Testament such as the 'saving fire' in 1 Cor. 3:15 by Paul, the notion of 'fearing God who can destroy the soul in Gehenna', the fire testing works in Revelation, and the eternal punishment along with temporary in Matthew.
I would also like to add that the Greek philosophical notion was an eternal hell, and an immortal soul.
Thoughts?