Hell Must Be Forever

The Christian church has always taught that hell is eternal, forever, unending. Holy Scripture quotes our Lord Jesus' reply to those who reject him in this life, contrasting hell with heaven.

Then he will answer them, saying, 'Truly, I say to you, as you did not do it to one of the least of these, you did not do it to me.' And these will go away into eternal punishment, but the righteous into eternal life." - Mat 25:45-46 ESV

John the Baptist is quoted as saying the same thing,

For he whom God has sent utters the words of God, for he gives the Spirit without measure. The Father loves the Son and has given all things into his hand. Whoever believes in the Son has eternal life; whoever does not obey the Son shall not see life, but the wrath of God remains on him. - John 3:34-36 ESV

Yes, it is true that the term eternity is sometimes used in the weakened sense of long duration. For example,

"This day shall be for you a memorial day, and you shall keep it as a feast to the LORD; throughout your generations, as a statute forever (Hebr. 'owlam), you shall keep it as a feast. ... You shall observe this rite as a statute for you and for your sons forever. - Exod 12:14, 24 ESV 

The Passover has been replaced by the Lord's Supper. Consequently the term forever does not mean eternal or without end in such references, but in all references to heaven and hell it does indeed mean forever. So the Apostle Paul also writes about the misery of those damned in hell.

Therefore we ourselves boast about you in the churches of God for your steadfastness and faith in all your persecutions and in the afflictions that you are enduring. This is evidence of the righteous judgment of God, that you may be considered worthy of the kingdom of God, for which you are also suffering-- since indeed God considers it just to repay with affliction those who afflict you, and to grant relief to you who are afflicted as well as to us, when the Lord Jesus is revealed from heaven with his mighty angels in flaming fire, inflicting vengeance on those who do not know God and on those who do not obey the gospel of our Lord Jesus. They will suffer the punishment of eternal destruction, away from the presence of the Lord and from the glory of his might, when he comes on that day to be glorified in his saints, and to be marveled at among all who have believed, because our testimony to you was believed. - 2 Thess 1:4-10 ESV

But why? Why? we ask again. Why would a loving God bring eternal destruction upon a world that he claims to love so much? The answer  lies in the very nature of God. He is totally reliable. You can always depend upon him and his Word. He never lies. He never changes. He is always the same. He is completely worthy of our trust. He does not change his mind. He will do what he has said he will do.

He who calls you is faithful; he will surely do it. - 1 Thess 5:24 ESV 

God is not man, that he should lie, or a son of man, that he should change his mind. Has he said, and will he not do it? Or has he spoken, and will he not fulfill it? - Num 23:19 ESV

There is but one God. To reject him is to reject life itself. This was so from the very beginning. And yet God loves us all, regardless of race, status, position or place. But there is not a just man among us who has loved God with all his or her heart, mind and power (Rom. 3:10-18). How can we possibly be reconciled to God? How can God remain true to himself and still forgive us and freely give to us eternal life? Only in Jesus Christ. In Christ God has reconciled us all to himself. So the Apostle writes of Christ,

For in him all the fullness of God was pleased to dwell, and through him to reconcile to himself all things, whether on earth or in heaven, making peace by the blood of his cross. And you, who once were alienated and hostile in mind, doing evil deeds, he has now reconciled in his body of flesh by his death, in order to present you holy and blameless and above reproach before him, - Col 1:19-22 ESV

It follows then that God has no other choice. To be who he is, both just, faithful and loving, he must pronounce judgment and eternal death upon  those who turn their backs upon his mercy and forgiveness freely offered in Christ. To quote John as I did above, "whoever does not obey the Son shall not see life, but the wrath of God remains on him" (John 3:36).