Good question.. if eternal life is possible..
then is eternal past and eternal future possible also?..
What is "spirit/Spirit"?.. We really dont know in a material way..
We tend to look at life carnally(flesh)..
Where did our/the spirit come from..
Is it possible that our spirit is a evil angel getting a second chance?..
A second to reject Satan and his gospel..
Which is, "Eat from the Tree of the Knowledge of Good and Evil and YOU will be like God"..
Can a man decide good and evil himself?..
Often, The good can be evil and the evil can be good..
The observer problem trumps a proper diagnosis..
What IF, an recalcitrant (evil)Angel had his "mind" blanked/cleared/occluded before being injected into a human body at conception.. You know.. to make the test (of being human) legitimate.. And that "angel" grows into that body identifying with the body instead of the spirit that he actually is.. thinking that he is merely flesh?..
That would make us all prodigal sons.. and provide a good test of our real spiritual proclivities.. Some opting for evil or good and opting to allow God to diagnose that..
If SO, then God is a genius.. what a plan... What a wonderful plan..
i.e. a second chance for Satans minions.. and for Satan himself..
Sorry, pure Bovine scatology ... when you were created in body, your soul contasining a spirit component also came into being.
Pre-mortal existence (other than Christ of course) makes a good backdrop for a novel, movie or television script. And it is LDS theology (and a minority view in Judaism and Islam.)
But it is not Scriptural: