stunnedbygrace,
The reason that i ask people for verses that are not taken from The Revelation or from Matthew, is because they typically want to try to make a symbolic verse found in those epistles teach their literal theology.
And that can't ever work out as truth.
Paul does not use a lot of Symbolism, He mostly just teaches Literal Spiritual Light.
Also, The Lake of fire, which is known as the "2nd Death", never ends.
So, burning, in whatever capacity this is.....whatever this means, Literally,.....will continue for the Christ Rejector for as Long as God lives.
God never dies, as He has no beginning or ending.