I don't know what resource could be more important or authoritative than the literal Greek New Testament. One such resource is Rotherham's Emphasized Bible, the most literal copy ever produced.
The Bible makes it clear that the purpose of "hell" or suffering is not to torture people, but to cause them to learn from their mistakes and grow closer to perfection. Divine judgment is reformative, not vindictive. The word used in the original Greek New Testament is kolasis, which means a beneficial chastening such as a gardener prunes a vine to remove dead vegetation and make it grow more fruitfully.
Proportionality also ensures that any judgments upon a soul by God must be temporary and limited, since the sin that caused those judgments to ensue was also limited. This is a basic, Biblical teaching about divine justice -- and it is also common sense. The word used in the original New Testament to express this limited judgment is aionios, which means lasting for a distinct age or period of time. It is the Greek word from which we derive the English word eon. There is no such thing as "eternal" hell, despite what many Christians have been led to believe based on mistranslations of the Bible. In principle, it could be forever because humans have the freedom to continue to reject God. By this same principle, universalism is as false as is eternal hell.
Nevertheless, when Jesus spoke of God's judgment upon the wicked, he did so with words that implied a limited, corrective punishment. Specifically, he referred to divine judgment as aionios kolasis, meaning age-long chastisement.
Many Christians think they are defending the Gospel when they portray God as a vindictive eternal punisher when in reality they are impugning God's character.