For a layman to understand Bhagavad Gita here are the salient points:
It is Bhagavad Gita and Bhagavad Gita only that tells mankind the path to gaining enlightenment, becoming a Mahavira, Gautama Buddha Jesus Christ or Prophet Mohammed.
If other religions preached otherwise, it was spreading ignorance.
As per Bhagavad Gita every single human being on mother earth would gain enlightenment one day. This is ordained by God Almighty himself, Brahman in Hinduism.
How to become a man god like Mahavira, Gautama Buddha Jesus Christ or Prophet Mohammed is well scripted in 700 shlokas verses contained in Bhagavad Gita.
Bhagavad Gita is purely a spiritual document; it never advocates indulging in religious practices (rituals). Going to temples, churches and mosques gained nothing in life says Bhagavad Gita.
The ultimate goal of human life as per Bhagavad Gita is becoming a pure soul atman forever.
Bhagavad Gita not only proves existence of God Almighty but also world of souls’ atmans, the spirit consciousness existing in all human beings within our heart. It is this Prana energy that is the real essence of life. This prana energy, spirit is also the master and controller of human body.
As per Bhagavad Gita the spirit manifests human form to work out its karma, remove dross impurities within. Indulging in spirituality the moment our karma negates to zero, one reaches state of absolute purity becoming a Mahavira, Gautama Buddha, Jesus Christ or Prophet Mohammed. As per Bhagavad Gita no human being can escape indulging in spirituality.
Whether we do it in present life time or leave it for future manifestations is solely dependent on us.
As per Bhagavad Gita we have to become our original self, a pure soul atman. And for this spirituality demands our demolishing ego in totality. Furthermore we have to overpower five senses and mind by reducing our desires and wishes in stages.
To awaken kundalini shakti we have to practice absolute celibacy for a minimum period of 12 years in continuation. Doing so we can activate dormant lying portions of our brain! Normal human beings used their brain 1 to 2%, the remaining always lying dormant. It is kundalini that helps activate brain to full capacity 100%.
Full activation of brain 100% means becoming an enlightened one, a bodhi, a Jina… a Mahavira.
As per Bhagavad Gita the moment an enlightened one left mortal frame one attains moksha salvation, liberates from cycle of birth and death forever. The liberated soul atman finally merges with God forever.