I, as a Catholic, do struggle with this concept of eternal torment but do not disagree with it. I struggle because in Revelation 20: It first states this:
 And there came down fire from God out of heaven, and devoured them; and the devil, who seduced them, was cast into the pool of fire and brimstone, where both the beast  And the false prophet shall be tormented day and night for ever and ever.
So this is obviously torement forever in the lake of fire, but then right after it says this:
 And I saw the dead, great and small, standing in the presence of the throne, and the books were opened; and another book was opened, which is the book of life; and the dead were judged by those things which were written in the books, according to their works.  And the sea gave up the dead that were in it, and death and hell gave up their dead that were in them; and they were judged every one according to their works.  **And hell and death were cast into the pool of fire. **This is the second death.  And whosoever was not found written in the book of life, was cast into the pool of fire.
The damned go to Hell and suffer under the tormenter and controller of Hell, Satan but at Judgement Satan is thrown into the Lake of Fire which I take differently as Hell so even he is tormented now for all eternity where I guess right now he is not suffereing. Then those that were in hell with Satan too are now cast into the lake of fire. What is the lake of fire? Is the torment for all eternity burning in torment or is it final destruction or annihilation. I think I struggle with this because I feel at final judgement being completely destroyed and no more so to speak seems more loving and God while eternal torment while in hell before final judgement feels so evil and terrible by the devil. Does God need eternal torment after final judgement is the question I always have in my mind. Any help in this stumbling block I have would be greatly appreciated!!
Thank you and God Bless you all and may the Lord Our God truly save everyone from the fires of Hell and lead all souls to Heaven!