The soul is the energy in you that allows you to move. It is the life in you. It is you on a metaphysical level, and your flesh and what you do is the physical manifestation of it. "As above, so below." So when your flesh gets too old and decays to naught, the soul is what is left. Just as science says "Energy is neither created nor destroyed", this is the soul. In religious texts, it is looked as the "essence of God", that which was never created nor destroyed, but always was and will be. As it is written in holy texts, "heaven (the abode of God) is WITHIN you" and also it is written, "I have said, ye are gods". These days they (the powers that rule in the physical, mostly using metaphysical/spiritual means) have separated science from spirituality/religion to dumb the people down. And divide the people when they are talking about the same thing, thus not allowing them to build and create with each other, but causing them to fight and destroy each other.
Of course though, we cannot see the metaphysical (spirit realm) with physical eyes, only the result/manifestation of it. This is the idea of the "third eye", I.e. faith. As it is written in holy texts, faith is the substance of things not seen. Faith is believing something that you cannot see. Like faith that one day you'll get that job.
Therefore, the soul and the future of it totally depends on faith, i.e. what you truly believe will happen. Because what you believe is indeed true for your life. Don't get it twisted though, you cannot fool the soul as it is bound by the logic (from the word Logos, look it up) that it understands (understand, stand under, i.e. involuntarily worships, or is subject to). If one does harmful acts to others, and believe he/she must do so in order to live, then they agree subconsciously that one day they will be destroyed merely because they know/believe in their mind that others must do the same to survive, i.e. dog eat dog world. Therefore logically, they must live in a state of fear (whether it is GREAT fear or not so great fear), knowing that other beings must have the exact same sentiment.
The dog-eat-dog world mentality aka survival of the fittest is an animalistic, fleshly way of living. The flesh (the physical) can and will be destroyed as history has always proved. Whether it is something made by hands, or a physical person/animal. So if the soul (the higher self) descends to the way of living according to the flesh (the lower self), it throw its own self into... well... a perpetual state of destruction. As it cannot be destroyed, only be in a state of being destroyed. There are several different ways of saying this, the most common and understood way is the ancient Hebrew idea of "hell". It is a perpetual state of fear and anguish. As it is written so eloquently is holy texts, there is "weeping and gnashing of teeth".
Which of course, shows that there is an alternative way to live. As oppose to allow the soul (the higher self) descend to the the way of the flesh (the lower self), one could choose the opposite. If the soul never dies, then what happens when ones flesh chooses to follow the way of the soul?
edit: This leads me to believe that choice/"personal judgement" or one's LAW or CODE they choose to live by is the higher self, and the physical manifestation of this aka one's actions/reactions/"works"/is the flesh. Which now begs the question, what law results if perfect peace?
This leads us to see that the law of the spirit/metaphysical is the way of the higher/quicker (LOL, MUCH quicker) self and the law of physics is the way of the lower/slower self. Now what is the law of the spirit then? Here I digress as this is where one makes the decision on their faith as there are many systems of law which they call "religions". And as we have seen over the course of history, this is when people get in their feelings, straying from using logic and reasoning.
