On the topic of moksha salvation… Bhagavad Gita of Hinduism is absolutely clear. Human beings could reach stage of moksha salvation only by following teachings contained in Bhagavad Gita. Even man gods like Mahavira, Gautama Buddha, Jesus Christ and Prophet Mohammed finally gained enlightenment and then moksha salvation in their lifetime by following precepts contained in Bhagavad Gita of Hinduism.
The concept of moksha salvation is not new to Hinduism. In India hundreds if not thousands gained enlightenment in the entire history of mankind compared to only two in West… Jesus Christ and Prophet Mohammed! In West where people believed more in science… reaching stage of enlightenment and finally moksha salvation was difficult to achieve. Moksha salvation can only be achieved by one who had absolute faith in God Almighty all the time.
As per Bhagavad Gita moksha salvation is the stage when after gaining absolute purity… a soul atman left for kingdom of God (termed Vaikuntha in Hinduism). Moksha salvation is gained after reaching stage of enlightenment (termed kaivalya jnana in Hinduism). Religious followers who had no inkling about precepts of spirituality did not know anything about moksha salvation. Such human beings never reached God in their lifetime. A soul is termed atman in Hinduism.
To reach stage of moksha salvation… Bhagavad Gita advocates following path of pure spirituality. To know our true inner self… to realize our inner self… to realize our soul atman, the spirit within… undertaking spiritual journey was mandated by God Almighty. By indulging in sacred scriptures of different religions of world human beings step-by-step eradicated dross impurities within their soul atman. The moment karma negated to zero… one finally reached stage of enlightenment forever!
After reaching stage of moksha salvation… the liberated soul atman entered kingdom of God (never kingdom of heaven). The kingdom of heaven is an interim place for souls’ atmans to hibernate when matching parents were not available on mother earth. None could go to kingdom of heaven bodily. Kingdom of heaven existed in center of sun where temperatures exceed millions of degrees centigrade. It is in such high temperatures all souls atmans felt comfortable.
For human beings to reach stage of moksha salvation… Bhagavad Gita advises taking path of absolute truthfulness. That was how human beings finally succeeded in negating their karma to zero which was a slow long drawn process. Karma can only be negated to zero by establishing absolute control over five senses and mind. In a world dominated by bloated egos… practising pure spirituality almost seemed next to impossible.
Only an ardent seeker of spirituality like Swami Vivekananda finally succeeds in purifying self. Control on five senses and mind needs many life cycles of varying manifestations by our soul atman, the spirit within. By practising patience, persistence and perseverance at its level best… human beings slowly moved ahead on spiritual scale. Spirituality almost demands hundred percent perfection in everything one indulged!
Control on senses can still be achieved easily but establishing control on mind power takes time. Sage Vishwamitra… a highly accomplished saint of his era on sighting a maiden woman in forlorn circumstances in deep dense jungles (forests) fell from grace. He had to repeat practice of celibacy all over again. To maintain a positive attitude in life all the time is really difficult in present scientific age… present Kali Yuga… Dark Age… metal age!
By maintaining a positive flow of thoughts all the time human beings slowly and in stages established control over hidden inhibitions of lust and power. By exercising free will at its best… human beings finally established control over five senses and mind. Establishing control over mind power was the last factor before human beings gained enlightenment forever. Gaining control over mind power means reaching stage of Nirvikalpa Samadhi… when not a single thought entered our brain uninvoked. It was stage of pure bliss experienced by an enlightened one.