Bhagavad Gita As It is confirms that the individual jiva-souls were never created because, like Krsna, they have no origin, and therefore have existed for infinity.

Bhagavad Gita As It Is - "Never was there a time when I did not exist, nor you, nor all these kings; nor in the future shall any of us cease to be." (BG, Ch 2 Text 12)

Bhagavad Gita As It Is - "As the embodied soul continuously passes, in this body, from boyhood to youth to old age, the soul similarly passes into another body at death. A sober person is not bewildered by such a change." (BG, Ch 2 text 13)

Bhagavad Gita As It Is - “O son of Kuntī, the nonpermanent appearance of happiness and distress, and their disappearance in due course, are like the appearance and disappearance of winter and summer seasons. They arise from sense perception, O scion of Bharata, and one must learn to tolerate them without being disturbed."(BG, Ch 2 text 14)

Bhagavad Gita As It Is - "O best among men [Arjuna], the person who is not disturbed by happiness and distress and is steady in both is certainly eligible for liberation." (BG, Ch 2 text 15)

Bhagavad Gita As It Is - "Those who are seers of the truth have concluded that of the nonexistent [the material body] there is no endurance and of the eternal [the soul] there is no change. This they have concluded by studying the nature of both." (BG, Ch 2 text 16)

Bhagavad Gita As It Is - "That which pervades the entire body you should know to be indestructible. No one is able to destroy that imperishable soul." (BG, Ch 2 text 17)

Bhagavad Gita As It Is - "Neither he who thinks the living entity the slayer nor he who thinks it slain is in knowledge, for the self slays not nor is slain." (BG, Ch 2 text 19)

Bhagavad Gita As It Is - "For the soul there is neither birth nor death at any time. He has not come into being, does not come into being, and will not come into being. He is unborn, eternal, ever-existing and primeval. He is not slain when the body is slain." (BG, Ch 2 text 20 "corrected" 1983 edition)

Bhagavad Gita As It Is - "O Pārtha, how can a person who knows that the soul is indestructible, eternal, unborn and immutable kill anyone or cause anyone to kill?" (BG, Ch 2 text 21)

Bhagavad Gita As It Is - "As a person puts on new garments, giving up old ones, the soul similarly accepts new material bodies, giving up the old and useless ones." (BG, Ch 2 text 22)

Bhagavad Gita As It Is - "The soul can never be cut to pieces by any weapon, nor burned by fire, nor moistened by water, nor withered by the wind." (BG, Ch 2 text 23)

Bhagavad Gita As It Is - "This individual soul is unbreakable and insoluble, and can be neither burned nor dried. He is everlasting, present everywhere, unchangeable, immovable and eternally the same." (BG, Ch 2 text 24)

Bhagavad Gita As It Is - "It is said that the soul is invisible, inconceivable and immutable. Knowing this, you should not grieve for the body." (BG, Ch 2 text 25)

Bhagavad Gita As It Is - "One who has taken his birth is sure to die, and after death one is sure to take birth again. Therefore, in the unavoidable discharge of your duty, you should not lament."  (BG, Ch 2 text 27)

Bhagavad Gita As It Is - "Some look on the soul as amazing, some describe him as amazing, and some hear of him as amazing, while others, even after hearing about him, cannot understand him at all." (BG, Ch 2 text 29)

Bhagavad Gita As It Is - "O descendant of Bharata, he who dwells in the material body can never be slain. Therefore, you need not grieve for any living being." (BG, Ch 2 text 30)

Srila Prabhupada – "There are no new souls, new and old are due to this material body, but the jiva-soul is never born and never dies, so if there is no birth, how can there be new souls?" (Letter to Jagadisa dasa, July 9, 1970)

The individual jiva-souls can fall to an inactive or dormant state called the impersonal Brahmajyoti, but they certainly did not originate from there or can eternally remain there.

Srila Prabhupada - ''Existence in the impersonal brahmajyoti is also within the category of non-Krsna consciousness. Those who are in the brahman effulgence (impersonal Brahmajyoti) are also in the fallen condition, so there is no question of falling down from a fallen condition. When fall takes place it means falling down from the non-fallen condition. The non-fallen condition is Krsna consciousness [Vaikuntha or Goloka-Vrindavana]." (Letter to Revatinandana dasa, LA 13 June, 1970)

Even entering the impersonal Brahmajyoti or Brahman is also only a temporary relief for the eternal jiva-souls who enter there to escape the suffering and pain of being embodied in the material world and trapped in the cycle of repeated birth and death.

The implications of living for infinity means the individual jiva-soul can, over the eternity of time, be anyone and almost every bodily vessel there is over eternity.  

There is no limitations to what the individual jiva-souls can experience in the material world.

The implications of "infinity" is mind blowing. 

It's not that you can be Lennon, J.F. Kennedy, the King, Elvis etc, but the individual jiva-soul can stay in the material world for so long that they can live an almost identical life to those mentioned. And the elements of material energy over that infinity, will eventually repeat itself.

In other words, if you stay long enough in the material world in the cycle of repeated birth and death, you CAN experience the existence of every material bodily vessel.

The key word is "infinity" that makes this scenario not only possible, but will definitely happen to all individual jiva-souls who foolishly choose to remain in the temporary material world of repeated birth and death.

The only escape from all this is finding a bonafide genuine Spiritual Master (Guru) and allow them to guide you back home back to Godhead and out of the material dream world.*