Well, I've just read this thread and want to shove my oar in (or whatever!)
I am an evangelical christian, very deeply committed to following my faith. I have really struggled with the issue of who will and won't get into heaven though. The idea of people being condemned to hell is as upsetting and offensive to me as it is to anyone, esp. in view of people I've known and cared about who have died as non-christians.
This may come across as woolly-liberal but my thoughts are as follows - God is love, and His love is infintely deeper and better than any human love. He created people out of love, and it would go against that love to deliberately make it difficult to go to heaven, i.e. to be with him for all time. And He is also a much fairer judge than any human judge, so He alone can judge the hearts and minds of individuals.
(There is a strong theme of judgement in the Bible - the interesting thing is that to the Hebrews, God's judgement was always seen as a Very Good Thing because they knew that He would judge fairly and rescue them from unjust situations like being Pharoah's slaves in Egypt. Whereas to us Westerns, jugdement is seen as a Very Bad Thing because we instinctively feel that we will be condemned unfairly.)
Threfore, how can I presume to judge on God's behalf? How can I possibly say who will be in heaven? To me that is the height of theological arrogance. We just don't know who will get into heaven.
And this business about christianity only being about what you belive, not what you do, about living a good life...well to me that's just plain bad theology. The Bible goes on and on and on about living a good life! And links living a good life with going to heaven. Jesus told a story about the 'sheep and the goats' - i.e. who goes to heaven and who doesn't. He makes it clear that some won't. The ones who do, he gives ther reasons why they qualify (crude word there, sorry) - "For I was hungry and you gave me something to eat, I was thirsty and you gave me something to drink...I was sick and you looked after me...etc etc...whatever you did for the least of these brothers (or sisters) of mine, you did for me".
We have that verse framed in our kitchen and it reminds me that every drink I get for the dc, every plaster I stick on their knees, every little act of kindness and looking-after I do foor the dc, I am doing for Jesus because it is by serving others that I serve Him.
Anyway, the bottom line as I see it, is that christainity is all about responding to God, getting to know Him better and experiencing His love more, and showing His love to others more and more through the way I live. There are tricky bits in the Bible that I find difficult but my MO is "Everything I know of God gives me the confidence to trust Him for the bits that I don't know, or dislike". And that includes heaven.