There is a parable of Jesus in Matthew 25:31-46 that is problematic for a lot of Christians.
Non Christians have no problems with this parable because it seems obvious that good people, regardless of religious affiliation, will go to heaven and bad people will go to hell. In fact, this parable is rather comforting because Jesus is saying it's the little acts of kindness that we're all capable of doing that gets us into his good grace, not the heroic 'walk on glass and get burnt at the stake' martyrdom stuff of saints. You don't have to be Mother Theresa or the Pope to get in; you could help out at the food bank.
The problem Evangelical Christians have with this parable is because we believe we're saved by grace through faith alone. It is Martin Luther's battle cry sola fide - faith alone. I have a problem with this parable because I don't believe in eternal damnation.
The key to this parable is found in the epistle 1 John, particularly the verse 1 John 1:2. "The life appeared; we have seen it and testify to it, and we proclaim to you the eternal life, which was with the Father and has appeared to us."
Eternal life is Jesus Christ. It is the incarnation. It is us in Him and He in us. If we do good, we get Him as our reward. Being kind and loving to someone is practicing His presence. Being cruel means not getting him or getting the other guy which counts as the opposite concept, eternal punishment. Eternal life begins right now with our next act of lovingkindness.
This is because God is Love and Love gives. God gave us everything He had: His Son to show us who He is; His Spirit to guide and comfort us; and Himself to love and father us. We are all His children.
Both Paul and Jesus said that if we loved God with all our heart, soul, strength and mind and if we loved our neighbour as ourselves, we fulfill all the commandments. The odd thing I've found when teaching people this concept is that some believe that loving God means hating certain people like Muslims or homosexuals. To my consternation, I found that I could not convince them that we love God by loving others and we love others by loving God. In the end, I had to drop God from the equation and say, "When caught in a moral dilemma, do the most loving thing for the people involved." I hope someday I can put God back in but I'll have to change who people believe God is and that is a herculean task.
Just in case that sounds like a cop out (which it is, by the way)....
A friend introduced me to a group who believes God is angry all the time against sinners. (Thanks Lance) The surprise is they are more gracious and loving than their God. But they believe loving God means hating those He (or so they believe) hates and their hate is unleavened by mercy or grace because they believe God is unrelenting in His judgment. They were the ones who got me thinking about Matthew 25 because they threw it to me along with other biblical passages, all in the Authorized King James Version, which had double the references to hell than my bible. So I do owe them thanks for this post.
"Luke, don't give in to hate. That leads to the Dark Side." Obi-Wan Kenobi