No one likes to talk about hell. The famous Christian thinker and author CS Lewis wrote, "There is no doctrine which I would more willingly remove from Christianity than this, if it lay in my power. But it has the full support of Scripture, and specially, of our Lord's own words; it has always been held by Christendom; and it has the support of reason."
One of the major reasons Lewis suggests that hell is rationale (and not just Biblical) is that hell seems to be an eternity of personal decisions to reject God's love, mercy, and authority, leaving individuals with hate, self-love, mercilessness, pride, etc. (the opposite of what God offers). Hell is the residence of self-will in action.
Lewis notes: "I willingly believe that the damned are, in one sense, successful, rebels to the end; that the doors of Hell are locked on the inside. I do not mean that the ghosts may not wish to come out of Hell, in the vague fashion wherein an envious man 'wishes' to be happy: but they certainly do not will even the first preliminary stages of that self-abandonment though which alone the soul can reach any good. They enjoy forever the horrible freedom they have demanded, and are therefore self-enslaved; just as the blessed, forever submitting to obedience, become through all eternity more and more free. In the long run the answer to all those who object to the doctrine of Hell, is itself a question, 'What are you asking God to do?' To wipe out their past sings and , at all costs, to give them a fresh start, smoothing every difficulty and offering every miraculous help? But He has done so, on Calvary. To forgive them? They will not be forgiven. To leave them alone? Alas, I am afraid that is what He does."