Let us ask you the most important question ever asked. Eternity is a long, long time . . . It never ends . . . Eternity goes on forever and ever and ever and ever and ever and ever and ever . . . . . . . . Consciousness means that you will know what is going on around you.
Unquenchable fire is fire that never goes out.
Read the parable that Jesus taught about the rich man and Lazarus. One day in the future, death and Hell will be cast into the Lake of fire, a place of everlasting torment. Hell was actually never prepared for people but was prepared for the devil and his angels who rebelled against God. We leave God no choice if we choose to reject what God has given us. We condemn ourselves to hell when we refuse to believe the gospel of the Lord Jesus Christ.