hey i dont have a lot of time so sorry if someone posted this same point.
Buddhism and taoism both deal with the point of life. Scientists are constantly working to figure this out, in every aspect of their works. But if you really think long and hard about it, what do they have to find out? Only ways to make our lives easier and more enjoyable, really, that's all science has done for me in my lifetime. I'm not trying to bash it or anything (I'm in fact going to major in bio-mechanical engineering), it's just that as long as we are all going to die, then what? And if we can live forever, then what? You know? We can always become happier, more self-pleasing people, but so what of that?
I think that the statement of 'existing to exist' can be explained in the book 'Tao te ching' by lao tsu....google it, i'm sure you'll find an e-book. pretty much, taoism is acknowledging that everything will be lost eventually, so the only way to die satisfied is to wish for nothing. Rich people always want more money, and are never truly satisfied, but if you change your beliefs to want nothing, you'll have everything. See what I'm saying?