Sin Leads to Death and the Second Death which is Hell
We all sin. There is no person who has never not sinned. Sin leads to death and we all die. For example, if you drink too much or smoke, you have a higher probability of dying sooner than you would otherwise. If you have a temper or let other emotions eat away at you, you will die sooner. Unhealthy choices or thoughts suffer the same fate. Hence, sin leads to death. Even if we did not sin we would still eventually die, because our bodies are inherently weak. So when I refer to sin leading to death I am not referring to the death that we all eventually confront, but that of dying sooner than we would have.
Sin also leads to the second death which is Hell. How do I know this? I know God exists and Jesus is God by the proof for God of the Bible. Therefore, since Jesus spoke on Hell more than anyone, I know those who refuse to receive what He did for us on the cross will go to Hell. They would rather spend eternity in Hellfire. The only solution to sin is for God to take those sins back upon Himself if we are willingly to allow Him to do so.
God is infinitely greater than us so even one sin eternally separates us from God even if we repented of it. Even one sin eternally distances us from God because its damage has wrought in some way. For God to spend eternity with us He needs us to be likewise sinless; and have all sin punished accordingly. Also, just because you repent of a sin doesn't mean you don't have to do the time. A murderer and rapist don't get let out of jail because they repented. If you do the crime be willing to do the time: i.e., eternity in the Lake of Fire for continuing to reject the ransom paid. You say you are not afraid of God's judgment? I guess you're not.
"And death and Hades were cast into the lake of fire. This is the second death, the lake of fire" (Rev. 20.14). "But the fearful, and UNBELIEVING, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burns with fire and brimstone: which is the second death" (21.18). Unlike any natural fire that burns out, this one never does. "He shall be tormented with fire and brimstone" (14.10), and "they have no rest day nor night" (v.11), for it "will never burn out" (Matt. 25.41). They "will never die, and the fire that burns them will never go out" (Is. 66.24).
Praise the Lord for our glorious God who provides the solution through His redemptive design by His only begotten Son Jesus Christ who shed His precious blood for the forgiveness of sins for us to receive eternal life and our death with Him for resurrection life, otherwise we would all go to eternal jail. God sends nobody to Hell because they were born into sin, but if they refuse the solution to their sin problem, then Hell is the only solution to our sin nature. It looks like only God can never not sin and thus, never need to be punished for sin. Therefore, He becomes sin for us, taking our punishment upon Himself so that we can be punished in Him and with Him. So shall we be saved by grace through faith.
My Own Personal Sense of Holiness, Righteousness, Justice and Love
Now I also have a personal reason as well why Hell is necessary but is congruent with the Bible and thus, necessarily is what the Bible is saying. I believe it would be evil if God were to create us in His image and give us God-consciousness then to allow us to cease to exist. While it is allowable for pre-Adamic men and animals to cease to exist because they don't have God-consciousness, it would be unrighteous and unholy for God to allow us to cease to exist. Therefore, we will all be resurrected. However, it would also be evil of God if He were to allow atheists who remain atheistic, or those who still want to believe in Allah or reincarnation or continue in a particular sin, to be allowed into eternity future in the New City and New Earth with God's elect.
Would it not be similarly wrong to allow a rapist or other criminals out of jail who belongs there for life? How much more so for those who can inflict harm on God's people? There can be no sin in the New Earth. Any person who wants to remain in any sin including the sin of unbelief by definition is harmful to those around him. Christians though we may have a sin we are not aware of, we openly declare we want to be rid of all sin even those sins we are not aware of to allow God in time to cleanse us of all unrighteousness and self-righteousness.
You don't need to know more than what I have just told you-in fact, a fraction of what I said is probably enough-to know with certainty someone who refuses to give their life to Christ will go to Hell. And the decision is determined in the one life we have. If a person were to die sooner than another, God takes this into account so if that person were to live a full life, he still would not have given his life to Christ. And if he were to give his life to Christ I am sure God would save him. Though it is possible and plausible anyone who does die early would never have given their life to Christ so an early death by anyone, except for possibly children before the age of accountability, were never going to give their lives to Christ anyway.
If you want to argue it is unfair of God to send someone to Hell based on finite sins in this life, I would respond to you by saying who says they are finite? The atheist will continue to reject God not just in this life but in the next also by which he eternally separates himself from God. A clue to this fact is notice elderly people almost never give their lives to Christ. In fact, I can't even think of one. Even Antony Flew who was the most published and famous atheist scholar of the 20th century in his 80's became a deist theist in 2004. But guess what? He never gave his life to Christ. If you know of anyone who has, let me know.
The Pain of Atheism is Less Than the Fear of Losing Control
What's amazing about those who go to Hell is that the pain they have built up in themselves in rejecting God continues to permeate their being, as they wish, for eternity so that it would be more fearful and painful for them to give their lives to Christ in a million years from now than repent and believe in Christ to be regenerated. They may even consider it to be heaven, but those who truly know Heaven couldn't stand the heaven of atheists. An exponential progression of momentum builds up in their hearts.
In 6 years it become 6 times harder to give one's life to Christ. Giving up control of self becomes even scarier. In 6 times 6 years it becomes 6^6 times harder and scarier more still to let go of self, and so on, until nobody after they die would ever give their lives to Christ, not even one. Maybe, in part, that's why our maximum age is around where it is. At approximately 120 years the oldest age, there are 20 sets of 6 years. 6^20= ~4 million billion. If there has only been 50 billion souls since Adam, all the souls that ever lived have been covered to prove the point nobody would ever align themselves with or give their lives to Christ after death.
If anyone knows of anyone who has given their life to Christ in their 80's or 90's who was perhaps an atheist/agnostic all their life, or a Muslim, Roman Catholic or Hindu, please let me know and respond here.
"There is no fear in love, but perfect love casts out fear.
For fear has to do with punishment, and he who fears is not perfected in love" (1 John 4.18).