I have just finished a study of Hell – both Hades and Gehenna. You may request a copy of my findings.
The conclusion is so important.
Hades is that place after death for unbelievers – a place described by Jesus Christ as being a place of ‘torments’
Gehenna is that place after final judgement, where fire and brimstone implement the punishment deserved, along with outer darkness, weeping and gnashing of teeth.
What the Lord identified as being the key to avoiding such horrors, is so important:
To know HIM or rather to be known of Him.
“My sheep hear My voice and I know them and they follow Me..
I give unto them eternal life and they will never perish..” John 10
To not know HIM
He will say “ I tell you, I do not know where you have come from. Depart from Me all you workers of evil” Luke 13:27
And so it was that the Lord from heaven called people, and still calls, to Repent and believe the Gospel, so that they might be saved from eternal punishment and be saved to enjoy His company in heaven. Such was the seriousness of the situation, that He Himself died to rescue humanity from eternal misery.