Belief in god can never be based on rationality or evidence. It's strange that so many people of faith are so determined to try and prove that their is evidence. I guess deep down their faith is lacking and they are trying to convince themselves.
As a species, most of us are ingrained from birth with the notion that everything has a purpose. Knives are for cutting, blankets are for warmth, seats are for sitting. And, of course, the notion that People are special and are for something.
It's a warm comforting blanket of a thought that we as humans are something greater than what we really are - that there is something beyond the veil, something more than this existence.
However, it is also an imprisoning thought, a thought that breeds extremism, disillusionment, and ignorance.
Accepting that this life may very well be all there is really is a liberating thought. It's scary, but it is also liberating. If these years are the only years you have to your blip of an existence, then what the hell are we doing sitting on our asses? We should be doing all we can to enjoy what life has to offer, live in harmony with our planet and our fellow beings, and try to leave this place better than we found it.
If this life is it, if this is everything, we should care about the survival of our species even more so.
Life is beautiful. Wondrous.
If there is a purpose to life, it should be to be remembered. If there is a hope of living forever, it is a hope that we won't be ordinary and will live on in fond or inspiring memories, even if it is for only a few more generations after our expiration.
Enjoy. Love. Experience. Learn. Create! Inspire. By all means, LIVE.