Allegorically Lord Krishna in Bhagavad Gita represents prana, life energy we called soul atman existing in human body.
This soul atman residing in human body all the time conveys to human body its desire to reach cosmic end of life, 8.4 millionth manifestation, last in cosmic life cycle.
But dominated by ego we failed to hear dictates of soul atman coming from within our heart. And it is at this moment teachings of Lord Krishna in Bhagavad Gita come into play.
Lord Krishna prompts from within to indulge in spirituality to become an enlightened one, a bodhi, a Jina like Mahavira, Gautama Buddha, Jesus Christ or Prophet Mohammed.
And for indulging in spirituality we require demolition of ego in totality. Only then we can hear voice of soul atman coming from within our heart. To do this we have to become 100% truthful.
The voice of Lord Krishna from within further prompts that to reach state of enlightenment we have to overpower five senses and mind! Furthermore we have to awaken our kundalini shakti so that it reaches Ajna chakra. The moment this happens, dormant lying portions of our brain activated fully.
Normal human beings used their brain 1 to 2%, the balance always lying dormant. By full awakening of kundalini shakti we can activate our brain to full capacity 100%. One immediately becomes an enlightened one that very moment.
The message of Lord Krishna in Bhagavad Gita is clear, follow him until the end. But instead of following Lord Krishna from within we preferred dictates of our bloated ego that propelled us towards material riches. What to choose amongst the two rests with us.
By pursuing spirituality we can become a pure soul atman, liberate self from cycle of birth and death forever. Or else we can continue rotating in endless cycles of birth and death.
Reaching state of enlightenment is our ultimate goal of life. We can do it in present life time or postpone it for future manifestations.
Journey of spirituality as advocated in Bhagavad Gita is a full-time job. Most human beings indulged in spirituality worldwide partially, in part-time. This will not do. If we seriously desire emancipating from cycle of birth and death forever, we have to wholeheartedly indulge in spirituality detailed in Bhagavad Gita.
Bhagavad Gita is the only scripture in entire world that tells us why and how of spirituality.