We try to put the concepts of heaven and hell, eternal reward or eternal punishment in term that we can understand as good or evil because that is now how man operates after Adam and Eve ate from the Tree of the Knowledge of Good and Evil. We cannot grasp how God regards these things because He is coming from a completely foreign way of thinking. In trying to understand God’s way of thinking we probably need to think in terms of relationship… particularly the relationship within God himself and then how that is extended in His relationship with man or, in the case of some, the lack of relationship.
I have thought about some of the questions raised and may have some ideas as to why God would want to punish (if he does) people for all eternity. I am, by no means, any sort of great Biblical Scholar so, please, if (or maybe where) you see great gaping holes in my understandings of the matter, jump in and bring more clarity on the subject.
Why would God separate the good and the evil?
It is the love and mercy of God that those people, who have decided that they do not wish to have anything to do with God, get their desire and are separated from Him… and all those who have accepted God into their lives… for eternity.
Why is this God’s mercy?
When Adam and Eve sinned they were afraid of God and hid themselves. (Gen 3:8) For a soul that has not become redeemed by Christ this will be their reaction... fear. When God made offering for them they, in faith for the coming of Christ, were made right with God, within the boundaries of where they were at the time, and were able to maintain fellowship with God (implied by Gen 4:16) at the equivalent of the ‘mercy seat’ (i.e. the gateway into Eden where the Cherubim guarded the way Gen 3:24).
Cain, when his offering was rejected… after he killed Abel… chosen to leave the presence of God and go his own way (Gen 4:16). God did not stop him. Cain was not OK with being close to God’s presence and so had to get far away.
It can be a very scary thing to be face to face with God and not have your sin covered by the blood of Christ. The Children of Israel were taken out of Egypt to go and worship God in the wilderness. They were to be a nation of Priests to the Lord (Gen 19:6) but when God came down onto Mt Sinai they all chickened out. They told Moses to go up into the mountain to met God for them. They were afraid of God and thought they were going to die so put Moses into the hot seat instead of risking it themselves (Exo 20:18-21).
The fear and terror that people have of meeting God face to face, if they have not surrender their life to him, is so great that when Jesus returns they will be pleading the mountains to fall on them to hide them from the face of God (Rev 6:15&16).
So, rather than subjecting the spirit of those who have rejected God to be constantly faced with His presence, God has created a great chasm between Him and where those people have been (or will be sent) sent (Luk 16:26).
Why would they be sent to a lake of fire?
Not got a lot I can say on this one. I suspect it is a concession by God since, having rejected God, to be kept in His presence for eternity would be a far greater torment than being in a lake of fire. We are told that our God is a consuming fire (Heb12:29). This was seen, in some measure, by the Children or Israel at Mt Sinai (Exo 20:18). I’m pretty sure there are other references like this but I’ve not gone looking for them yet. Perhaps there is some element of fire where ever the New Heaven and Earth does not exist... a devil inspired mimic of being in the presence of God.
I did find Rev 20:15 “And if any was not found written in the book of life, he was cast into the lake of fire.” to be an interesting passage. I guess further study could revolve around the nature of the lake of fire and what it means to be, or not be, in the Lamb’s Book of Life
Why would they be there for eternity?
In the new heaven and new earth there is no time… so we, and they, exist for all eternity. Thank you Mark Quayle for making that point (#86)... it saves me having to make some of those observations. Before God made heaven and Earth there was no way in which time had any meaning. No night or day, no earth revolving around the sun. Time is only relevant within our current realm. When the end is come God is going to remove heaven and earth (Mat 24: 35, Rev 20:11, 21:1). In the New Jerusalem there is no need of Sun or Moon and there is no night because it is lit by the Glory of God so where would time be referenced from?