What is the relation between limited sin and eternal torture ?
We must know relation between sin and torture is not as time but it is as conclusion
For example when some one kill another at one moment but its conclusion dontinued all the time .
Another example : we believe allah and do prayer and our prophet believe allah and prayers to him how many different is between ore prayer and his prayer?!
So we see a lot of verses in quran show us these .like
یستعجلونک بالعذاب وان جهنم لمحیطة بالکافرین. Surah alankabot
54. They ask Thee to hasten on the punishment: But, of a surety, Hell will encompass the rejecters of Faith!-