Then if we're all nothing in the end, nothing but cold, hard science then what's the point? That means the universe and existence as we know it is limited to our minds. If I cease to exist, then my world ends. The world as I perceive it ends. So it's all nothing. Every thought, experience and action we've taken is utterly pointless in the scheme if of things. Humanity having learned something about itself or overcomming adversity would mean nothing if we we are all destroyed tomorrow. We just live out a meaningless existence? So then we're just tools of our own minds? Where's the fun in that?
Religions and souls aside, I'd like to think we're a little more than chemical compounds going around aimlessly until we experience our inevitable end. We have feelings, compassion, emotions, fears, the concepts of right and wrong. If we just go by "evidence" then we're nothing more than matter. So if that's the case, then why does any of this matter? If choices, ideals and morals are just human responses that we're taught and learn, why don't we just kill each other? It wouldn't be wrong. If all we're just "chemistry", if it's just chemicals in our brain, then what is stopping all of us from devouring each other? Simply survival? There's got to be more to it than that. The things humans cling to have got to be more than simply ideas, especially when we take love, empathy and humility into account. Just seeing it as a concepts and construct is a pretty nihilistic view. What are we all living for than? Just to live? We're just more sophisticated and inteligent animals? Why? Why have this capacity of feelings and knowledge?
Nah, people need something to cling on to and believe in, even if it doesn't "make sense" as far as science dictates to us. There's got to be a middle ground. There's got to be more than simply being ashes or maggot food six feet in the ground, even if it's just some stupid, romantic fantasy. I'm ME damn it, even when my brain doesn't exist I'll have to exist SOMEWHERE! Right? Think of your personality and everyone you love/loved, living and deceased. I'd rather have the mind set that they're somewhere and everything that they live/lived for had/has some meaning beyond, "we were once alive, now we're dead". Maybe that's the harsh reality, true, but what does somebody benefit from thinking embitterenly that way?
Then again, if there is something else after this, are we even us? Or are we mindless drones that don't have an ounce of freewill? The point of existence is to exist, because existence cannot not exist, and non-existence cannot exist; therefore, existence must exist always and forever without creation and without end. That is why science says matter becomes energy and energy becomes matter, but it never ceases to exist in one form or the other.
After it's all said and done, we'll have to be somewhere. Even if that place isn't harps in a sky, or surrounded by virgins, or getting eaten by worms.