I feel privaliged to have been able to read the moving and enlightening things have been said in this thread. I'd like to thank all for sharing.
Over the last several years, I have devoted several trips and quite a few meditations to contemplating this topic and I'd like to share my views on the issue. Although I ended up sharing the bare bones of a very complex mystical philosophy. I hope that people will accept my appologies for mangling tenses and grammar and spelling, as I'm quite tired.
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I believe that we are eternal. We are god. Not "God" with capital letters, but rather, the most infinitely small manifestation of the Divine, which I have, for no apparent reason, begun to think of as "ChaWa". Together, we along with every other sentient imaginable make up the entity that is "God". Or rather, he makes up us. His omniscience demands it.
But the problem is that God is infinite, omniscient and omnipotent, and this also means that all things being equal, God is bored shitless. Anything that he can do, he can do with the greatest of ease. His life contains no challenges at all. It is effectively meaningless as everything he tries to do is automatically done at the "easy" setting. He has one of the most difficult extistential crisis's imaginable.
But for the eternal being, there can be no destination. Instead, the journey is all that matters. But the really cool, mind blowing thing, is that God is an eternal being that has not committed suicide! He is a representation of psychological well adjustedness at an infinite scale. This also explains why God is Good (more on this later).
So, to keep himself sane, he spends his time exploring the infinite and all of the possibilities that it entails. He divides the eternal up into smaller sections and these divisions are what we call lives. Lives of universes, lives of galaxies, lives of people, lives of dogs and lives of ants. In search of interesting stories, he lives that are the exact opposite of his majesty; mundane, powerless and challenging. Your life. My life. The life of every possible sentient imaginable.
But this is an eternal being that we are talking about, so we aren't simply talking about God living your life and moving on. Rather, we are talking about living every possible variation of your life and the lives of every person on the planet. And the lives of every possible person and sentient that exists in all of the other possible variations of our universe. And once this has been done, doing the same in every possible concievable universe in every possible dimensional configuration.
The immensity of this is staggering and experiencing it is one of the most awe inspiring encounters with the Divine that I have been blessed with. It is also quite existentially terrifying. It is terrifying to know that I will experience all the misery and hatred that the world has to offer and that I am powerless to prevent it, beyond what I can do today in this life that I lead. But equally, it is uplifting, because the beautiful outcomes are truely awe inspiring. Indeed, such has been the power of the glorious, trancendance that I have comprehended, that I have come out of trances and trips, whispering the words, "thankyou", over and over again, without even realising it. It as if my subconcious wants to express spontaneous gratitude to the overself that is God.
But the mortal mind is not equipped to deal with the Infinite, hence the division into smaller parts, in which there is a beginning and an end. So death is God's gift to you. It allows you and every other creature to reset, to recharge before going on (hopefully this insight is of use to IJC). But the infinite mind is in a very real sense not fully equipped to understand the mortal and while for most of us our lives are calibrated to be challenging, on occassion they will be too hard for us to deal with and even overwhelming in thier scope.
As such, I believe that suicide isn't evil, selfish, or wrong. Indeed, sometimes it might even be neccessary, but mostly, I believe it is pointless. Commit suicide and you will merely find yourself back in exactly the same place, as God (ie. you!) explores the variation on the infinite in which you didn't commit suicide. Maybe the next time around, you will live a long happy life. Maybe you'll instead commit suicide a few days later. Either way, you will continue to explore the infinite possibilities until they are exhasted. The pain and the joy are there and will be experienced by the Infinite Mind of the Divine.
But our lives aren't just our lives. Our lives are the lives of everyone around us. Indeed, our lives are not complete until we have lived them through the lives of everyone with whom we have interacted in our time on earth! This is possible, because we are all motes of God and the evidence for this can be found during the Near Death Experience, when a person has their past life review, in which they relive their life. But the amazing thing is that during the NDE people relive their lives from the perspective and experience of others, both human and animal. When we die, we will feel the joy and uplifting of the love we bought and the humiliation and anguish of the misery we created. Thus we experience the true extent of our lives. Thus we learn empathy and can now understand why God is good. He has experiened every evil that the world has produced and as such has learnt the value of the good in a very personal way.
But what is the purpose? Personally, I believe that God is seeking to tell stories of immense scope and stature. He alone is the force who can bind all of our realities together, and can feel all of the emotions present when sentients get together. He feels the joy of two lovers, tinged with the jelousy of the secret admirer, who knows that he can never be a part of that love. For him, our lives are a symphony of emotions, feelings and ideas that coexist harmoniously together, in a majesty that we can only vaguely comprehend. The feelings of the suicidal person add to that strange emotional harmony and I suspect that their death creates a dissonant wave, whereas thier salvation and ongoing life, difficult as it may be continues to add an additional counterpoint that would otherwise be lacking.
On another level, God is setting out to tell the stories that speak of the greatness that sentient life can achieve. Many of the stories told will be those of people such as Hitler, Stalin and Mao, but imagine the glorious outcome if that evil were instead manifest as good. If a nation instead of sending millions of its young into war and death, instead sent millions to help, teach and lift up the less fortunate than they. I believe it is these outcomes that God seeks to find and that in effect, we are all parts of the solution. There are an infinite number of glorious stories to be told, and each of us will contribute in a very definite way to those outcomes. It could be that a person's suicide means that it is so much less likely that our particular path will tell such a story.
However, the reality is that for many people, life simply is not worth living. Perhaps they have major psychological issues, or chronic pain that makes their lives unbearable, or have been diagnosed with a chronic debilitating, or even fatal disease. For these people, we should extend the right to take their own lives, while doing our best as a society to ensure that through thier own free and unmanipulated will, they refrain from doing so. Indeed, the health of our society, and can be measured by the degree of empathy for its most distressed members and I believe that a society that cares for its members will find that they refrain from needlessly killing themselves.
The reality is that many people who attempt to commit suicide report feeling desperately lonely, isolated and as if the world doesn't care about them and this is a key aspect of our existence that needs to be addressed. There is but one moral commandment: "Act with Empathy" and each suicide is not just the "failure" (although I don't like that word here as it doesn't convey the subtlety that I am after) of the person who has taken their lives. Instead it is the failure (again I don't like that word) of the entire network of people and society that should be surrounding the person and helping them in their times of need. Much of this damage would have been done during childhoods of abuse, neglect, or mistreatment, but the cost of guilt is far too often born by the children, partners and siblings, who are left to wonder "why" and deal with feelings of guilt and loss.
Enough for now, I think!!