Well its a bit late but since I'm up and my meaning of life at the moment is centered on a bottle of Gaviscon, I'll give it a go.
For those among us who are perhaps of the Dawkins persuasion there is no point to life other than to survive long enough to pass on our genes. Seems a bit nihilistic but as was rightly pointed out on a thread a while ago, relatively few men who ever lived actually got to do that. Most die before procreating.
So what is left for me after passing on my genes to my DSs?
Well then I have to look to higher goals. Living a good and worthwhile life, seeking to leave the world a better place than when I entered it, leaving a mark on the world that others will remember me by, seeking out truths and knowledge that humankind can use when I have gone.
The great philosophers said similar things in more erudite ways but it all sounds a bit wishy washy to me.
Back to Dawkins and his idea of memes. Here I think I can identify more of what the meaning of life is. The point of life for me is to live on beyond my physical life through the influence I have on my children. By the sowing of not only genes within their bodies which they may pass to their children but also powerful memes. That is ideas, personal norms, beliefs, wisdom, that may in some way influence my children, their children and go beyond and be propogated into wider society.
PHEW! With that I really must get some sleep. Good night all.