If your life isn't yours to dispose of as you choose, then whose life is it, really? I think the threats of hell (eternal punishment) are mostly to make death sound worse than any problem a person can have while they are still alive. The problem with that is just that no one can really know except someone who has already died and they aren't talking. That's what faith is for; it fills in the gaps for what we can't know. The best argument I know of for not resorting to suicide is that it is a decision which can't be undone. It can't be properly evaluated because you can't put the unknown up against what you are facing and weigh the evidence. Having done it, if things are worse, there is no way back.