[10]  Why do we die?

Adam's sons and daughters are born condemned to death under the death penalty passed and eventually executed on Adam by God. If you do not believe that Adam and Eve were real, the death penalty that all mankind still suffers is certainly real enough. Even today scientists do not understand why a body which has the capability to fix itself, grows old and kills itself. Where is the evolutionary advantage in that? Like any other human, Adam could only pass on to his sons the life that he had. He could not pass on everlasting life to them, because he himself only had a finite life once he began to have children after he was thrown out of the garden. One cannot clean anything with dirty water. Likewise a priest cannot pass on to his congregation a cleanliness that he does not himself possess. 

When Adam sinned (on 3993Nisan14 BC) by eating the fruit of the tree and breaking the one and only law upon him, he was sentenced to death by God. But he did not physically die until 3097 BC, some 896 years later (since he lived to be 930 years old). During this time Adam and Eve had many children, both sons and daughters, and these interbred to form the very long lived pre-flood patriarchs of Genesis 5. Here is a list of their lengths of life as specified in Genesis 5...

Patriarch Length of life in years
Adam 930
Seth 912 
Enosh 905
Kenan 910
Mahalalel 895
Jared 962
Enoch 365 (did not die)
Methuselah 969
Lamech 777
Noah 950

The pre-adamic humans from whom Adam was begotten, lived as humans for a maximum of 50 years. The sons and daughters of Adam would have been forbidden from marrying pre-adamic partners before the flood, just as the Jews were forbidden to marry the Gentiles under the Law of Moses. Certainly those in the table above did not interbreed with the pre-adamics, since they all lived to a very ripe old age! The way that God executed the physical death penalty on Adam and on Eve and hence on all mankind is that he changed their genes from indefinitely lasting to finitely lasting. Adam and Eve did not age physically in the Garden of Eden, which paradise was a prophecy for the kingdom of God which is soon to come. The bible describes our parents loss of non ageing bodies as follows...

22 And Jehovah God went on to say: Here the man has become like one of us in knowing good and bad, and now in order that he may not put his hand out and actually take [fruit] also from the tree of life and eat and live to time indefinite [I will have to act].
23 With that Jehovah God put him out of the garden of Eden to cultivate the ground from which he had been taken (Genesis 3).

So if the pair had remained in the garden, eating from the tree of life, then they would not have died. So their bodies cannot have been ageing in the garden. So God changed their genes to the slowly dying variety that we all know today at the time of their sin. 

We are told that God made them some long garments of skin to wear as they left the garden. He did this physically because they only realised that they were naked after they had discovered sexual desire. And Adam only discovered sexual desire when Eve used it on him to get him to eat the fruit. It is not easy to see this from Genesis 3 (although it is possible), we know this happened because the whole story is an archetype for the way Satan uses women to get to men today. He tempts women into sin using their desire for status, and they tempt men into sin using man's desire for sex. And Eve only discovered sexual desire when Satan introduced her to it when he appeared to her as a human acting like a snake in the tree. He abused her desire for status to get what he wanted. He wanted to get Adam to sin, in order that he could terminate God's plan to use humans to condemn his heavenly activities, which we physicalise. He wished to avoid being exposed in front of his peers. So he sold knowledge of bad to Eve by telling her that if she ate from the tree she would be like God (having a vastly increased status) knowing good and bad.

4 At this the serpent said to the woman: Ye positively will not die.
5 For God knows that in the very day of your eating from it your eyes are bound to be opened and you are bound to be like God, knowing good and bad (Genesis 3).

Whereas God had said...

16 And Jehovah God also laid this command upon the man: From every tree of the garden you may eat to satisfaction
17
But as for the tree of the knowledge of good and bad you must not eat from it, for in the day you eat from it you will positively die (Genesis 2).

Satan it was who added to that command dishonestly when relaying it to Eve. So that Eve had the commandment from Satan (Elohim) as follows...

2 At this the woman said to the serpent: Of the fruit of the trees of the garden we may eat. 
3 But as for [eating] of the fruit of the tree that is in the middle of the garden, God [Elohim - not Jehovah Elohim] has said, 'You must not eat from it, no, you must not touch it that you do not die.' 

Satan did lie to Eve in verse 4 because he said ye (plural) will not die. Eve did not die but was raptured into an angel when her human body died. Adam however did enter into the first death. Satan would have been able to say to Eve, look touch the fruit I promise you you will not die. It was for this purpose that he deliberately overstated God when he was relaying it to Eve on God's behalf. But mankind, following his example, has been adding to the commands of God ever since...

9 It is in vain that they keep worshiping me, because they teach commands of men as doctrines (Matthew 15).

Eventually Eve was seduced by her desire for status and she ate. In fact, immediately after that, Satan seduced Eve and had reproductive sex with her becoming the father of Cain - see U314. This taught her to seduce Adam with his desire for her. 

Eve did not realise what she had done was bad until Adam explained it to her, she was thoroughly deceived. Her conscience only started beating her once Adam's started beating him, which presumably caused him to get angry at her.

14 Also, Adam was not deceived, but the woman was thoroughly deceived and came to be in transgression (1 Timothy 2).

Presumably Eve had just reached puberty when she was introduced to Adam and so had no concept of sexual desire. Adam had been in the garden since he was 11 - see I6. So he had no concept of sexual desire either. We can deduce that both Adam and Eve grew up around twice as slowly as we do today, since they had a much longer life span and none of the pre flood patriarchs of Genesis 5 or the post flood patriarchs of Genesis 11 had any children under the age of 29, whereas today boys reach puberty at around 12-14 years old. So in modern terms Adam had the body of a 16 year old when he sinned aged 33 years old and became sexually aware - see I6. Eve was presumably slightly younger. Once they realised that they were naked we read...

21 And Jehovah God proceeded to make long garments of skin for Adam and for his wife and to clothe them (Genesis 3).

The literal meaning of this is that God made them some clothes to wear from animal skins. But the concept of clothing our original parents is repeated. The true bible code, which is a symbolic code, tells us that successively repeated concepts have greater meanings. The greater meaning is that God gave the pair of them new approximately 900 year long ageing bodies (very long garments of skin).

These then are the garments of skin that we wear today (in a shorter variety). The death penalty that God passed on our parents exists and is enforced entirely by our genes, our bodies. We die due to ageing bodies, quite obviously, and we inherit these from Adam and Eve. So the sinner and the saint, the murderer and the doctor, die, not from whatever sins they may have committed during their lives, but actually from the death penalty executed upon our parents genes, which genes we all inherit.