We exist to exist: to live. To enjoy life, and make it enjoyable for others.
We exist to evolve: physically, mentally, and--what we've ignored in the last few thousand years--spiritually.
We exist to learn: all we do becomes part of our whole.
We exist to percieve: by existing, and questioning, we attempt to comprehend the universe. We are the universe viewing itself.
...and that is the most I've been able to hammer out in the English language in the last few weeks. Was I reacting to knowledge that I would see this earlier?
(I free-typed something similar, while typing a response to something totally different)