The Science
If you had a complex enough system, could you re-create the human brain?
Let's assume you are not limited by numbers. Let's say you are able to reverse-engineer the state space of the human cortex, idealizing each neuron to be active, 1, or inactive, 0. (That's 2 raised to 10 raised to the 10th power - a hyper-astronomical number vastly vastly exceeding the 10 to the 80th particles in the known universe) [Source:
http://www.npr.org/blogs/13.7/2010/03/the_hard_problem_conscousness.html]
Even the most advanced quantum physics fumbles with an explanation for the "manifestation" of Consciousness within this brain. The question is - how does the brain become the mind? And why oh why do we even need Consciousness? And let's not even get started on the question of questions, the hardest problem, what is Consciousness?
One must not confuse self-awareness with Consciousness. A monkey may identify with its image in a mirror, but does it question its own existence? Who knows, but it definitely cannot communicate its need to do so - something we do so effortlessly. (I may just be wrong with the last point too - I've even heard of gorillas being able to communicate their own impending deaths!)
We know one thing though - whatever it is, we have it. What do we do with it? Is its only use a sort of sado-masochist awareness of our own ignorance?
Introspection suggests otherwise. At the risk of sounding like a cheap hypnotist, what does your Consciousness feel like? Do you feel like your mind, body and Consciousness are one? Or do they feel like connected entities? Explore these "feelings". See where these lines blur. Feel the evaporation of your senses and the slow/scary dissolution of the separate "I", the ego.
Ask yourself a few questions. [Adapted from:
http://faculty.virginia.edu/consciousness/]
1. When you walk, do you instruct your legs to move or does that just happen?
2. When you make a mistake, think back to the key moment of its occurrence. Was it something you consciously did, or did it just happen? (A burst of short temper perhaps?)
3. When you think, do you control every thought or do they flow as helplessly as time?
In asking these questions, do you visualize several identities that are grouped within your "I" concept? If so, ask yourself if that is possible. Could that possibly be true?
All this is either alien to your intellect or resonates within your being. Either way, you live.
Beyond (behind?) the Science
So, why are we here? We shoo this question away because it is too deep to waste one's time with. The irony is that we seldom realize that we do not need time to do away with time.
The answer lies in this very moment, in which we will watch as the question burns itself out. It is not a pearl to be gained in a learning from the past, or a goal to be sought in an event in the future. It is found with an intensity that looks inward and then outward and sees that they are both One. That there is no subject-object relationship, but rather a manifestation within something that is best conceptualized as Oneness.
What was/is/will be there before/during/after all objects? What was there through all the years of your objective life? What was common to each and every one of those psychosomatic experiences? It was the sense of being - the I Am-ness as so many people call it. It does not require you to be. You - the manifestation of you - is appearing in it.
You know this feeling. It has different flavors. Some feel an emptiness, a bottomless black hole behind their mind, that imperceptibly absorbs it all. Some experience a sense of pure awareness - the simple realization that they are not the thinker, the doer or the feeler, but the one who announces the arrival of thought and claims it as its own.
You are not the human being interacting with this temporal reality, or the mind contained in it that analyzes everything from nanotechnology to premier league football. In truth, you are that in which all this appears. Every single thing. However, you've grown so attached to your point-of-view, that you've identified with it and tied yourself to its needs. Which is why, any spiritual quest usually ends in either an abandonment of every thing material and an adoption of complete inaction, or a disappointed return to normal run-of-the-mill life with its ups and downs, pleasures and pains, successes and failures and other expressions of the illusion of duality.
Now... you will inevitably ask - Why? Why do I appear in it?
Your mind cannot figure this one out, can it? Well, it's not supposed to - because just like you can only toss a coin that has two sides, you can't think without duality. You need there to be more than one to experience One. The Absolute creates relativity as a test of realization, you can say. Whatever you say, it will not be it, but it may point to it.
And yet, you can say, it is not this. It is not duality. It is non-duality. It is the absence of separation. It is the presence of Presence. Simply the feeling, "I am." Does that sink in? Do you realize that you have access to something that your identity has little meaning in?
A simple way of experiencing this if you haven't already, is to seek the source of your thoughts. I wonder if any image of a sequence of thoughts will be far different from a cloud of noise that appears within apparent infinity. Even time seems to be forced, and conceptual, here. You will find that any idea or thought you may have of yourself is also being watched by pure awareness. You can say the words, "I am a happy-go-lucky person.", but actually, you are able to say this only because you have a "third person perspective" of yourself within yourself but from something that has no sense of identity. A pure mirror that reflects everything, even the little that you have tied yourself to.
There is a certain deep fascination (satchidananda?) in rediscovering your true nature. It is the quantum mystery - being still and moving at the same time. But the stillness is the fundamental entity if you want to call it that. The rocking cradle.
The ocean is water. The wave is water. But the wave that identifies with itself knows that perhaps it might have come from the ocean but it is now a wave. And when it crashes against rock and merges with its source, would you say a being died or would you say a concept died? Individuality is a concept. Ego is a concept. A POWERFUL one at that, but it is that. Nothing dies because nothing really lives.
What was there before you were born? Before you parents were born? --> I Am-ness. It is the unchanging, untouchable noumenon of simply being. It is pointed to by the feeling you get when you think of the concept "Existence". It was there before the Big Bang and it will be there after the Universe expands into nothingness or collapses into somethingness.
What causes suffering? Identification with the manifestation rather than the I Am-ness. You think when you die, nothing changes or little changes or the change itself is cosmically irrelevant - and therefore your life is insignificant. And you therefore suffer the tragedy of clinging to this temporal existence as if it were a gift that will be taken away. Realize instead that this is a gift you are giving yourself, and taking away yourself - it is still yours and was never yours.
So be one with your natural state, that knows only that you are, and that everything else you believed was just that - a belief or a disbelief. Feel them all getting thrown out and revisit everything. From this place all is beautiful and all is unattached. No outcome is important. There is no battle to fight. Everything is perfect just as it is.
How reassuring is that!
But the funny thing is, you go there, and yet you are here. However you are now witnessing this being rather than being this being. There is pain and yet no suffering. There is emotion and yet no identification with it. There is no fight and yet you fight. There is no tree being cut and yet you hug it. No ecology to be saved and yet you save it. Everything is amplified by and yet simplified into that one statement - "I Am."
See that no state needs to be achieved. And yet it will be. It will play out as it will, and you will do as you will. You are not the doer and yet you must do. If you find that laughable, why do you take your 3 year old to the park? Why do you pick up a ball and whack it into holes? Why do you peg your happiness against numbers on a billboard?
Because it is all a ride. For fun. See who it is that is riding this ride. See. And be. And yet do without doing.
You must sleep to know what awake means. You must dream to know that you were dreaming. That is the rediscovery. The re-realization. Re-recognition. The coming and going. Seeing an old friend and going "HAH! I knew you!"
And THAT is why we are here.
Or, you know, 42.