James 4:17 says that if someone knows how to do what is right and does not do it, it is a sin for him.
Romans 6:23 says that the wages that sin pays is death.
Some churches and religions believe that when an unrepentant sinning person dies, his soul is tortured in fire forever and ever. This idea does not come from the Bible, but from Babylonian, Greek, and Roman mythology. In the Bible it is a matter of studying the original words, and their meanings. The Bible word for fiery hell is Gehenna, and it refers to the second death, the everlasting death from which there is no further resurrection.
Some atheists feel that since they believe that when you die, you die, so might as well live your life the way you want to, and then you die.
I won't buy that. I want the promise that God provides, and he has given us an idea of what living FOREVER in a peaceful world would be like. Also, following his moral direction, which is based on LOVE, makes this world a better place for me and for those who I meet.
I am not trying to save the world, some rich people imagine that donating a lot of their money to the evils of the world will help to eliminate them save the world. But even though they have the money to give, a lot of people are out there who will try to get it for themselves. So, donated food is stolen by greedy people who sell it on the black market. Also, the administrators of many charities get a huge chunk of the money meant for the poor and hungry, and that money lines their pockets.
That is why I point people to this promise of a better world, which is made possible through Jesus Christ and the kingdom, which he taught that we must pray for and seek first.
So, the penalty for unrepentant sin is everlasting death. But God promises a better system of things, and everlasting life, with righteousness. If that is what we want, then through faith and obedience in Jesus Christ, that is what we can get.
“Keep on, then, seeking first the Kingdom and his righteousness, and all these other things will be added to you.
2 Peter 3:13
But there are new heavens and a new earth that we are awaiting according to his promise, and in these righteousness is to dwell.
And he will wipe out every tear from their eyes, and death will be no more, neither will mourning nor outcry nor pain be anymore. The former things have passed away.”