Spirituality directly relates to our thinking prowess. As our thought process, indulgence in contemplation (chintan) relatively our spiritual progress. Spirituality is always indulged via chintan (indulgence in contemplation). There was no other path to progress spiritually.
Spiritual journey is never covered delving in sacred texts contained in scriptures of different religions of world. Path of jnana yoga (absolute wisdom) helps seekers in cutting darkness of ignorance within. Various queries within must dissolve permanently indulging in scriptures.
Spirituality was all about dissolving all queries within. The day we did not have even a single query left within, one reaches state of Nirvikalpa Samadhi (state of absolute nothingness) when not a single thought entered our brain uninvoked. This is the last stage of cosmic life.
Furthermore, indulging in absolute celibacy for a period of 12 years in continuation seekers finally awakened their kundalini spirit fully, the coiled Serpentine energy lying dormant in base of spine. Moment kundalini reaches Ajna chakra, Sahasra Pushpa (thousand petalled Lotus) existing in our brain behind forehead opens fully. One immediately becomes an enlightened one, a bodhi, a Jina… a Mahavira forever.
Normal human beings used their brain 1 to 2%, enlightened ones used 100%. Full activation of kundalini results in full activation of brain. Prime reason why seekers, travelers of spiritual path intermittently experienced big headaches!
Whenever a big bout of energy surged in the brain, we experienced a headache.
As no two human beings think same, the spiritual paths of all people would be different but the goal achieved in all cases would be same. All enlightened ones finally become a pure soul atman in the cosmic journey of life.
In the beginning when souls’ atmans started their cosmic journey they were pure. In the cosmic sojourn with the occurrence of big bang they gathered impurities. This baggage of dross impurities within every soul atman differed. Cleansing self of dross impurities within is what human journey all about. Of its own no soul atman can purify itself. It needs a medium, a body to work out its karma, remove dross impurities within.
When human beings indulging in chintan (contemplation) progressed spiritually, they finally reached state of no query within. The permanent thoughtlessness state is the state of kaivalya jnana when nothing remains in the soul except its original identity.
All enlightened souls like Mahavira, Gautama Buddha even Jesus Christ and Prophet Mohammed indulged in spirituality to reach state of enlightenment. The paths of all differed because their thought process was different. But at the end of journey all gained enlightenment, becoming a free soul atman in the bargain!
Furthermore, to cut darkness of ignorance within our indulgence in teachings of Bhagavad Gita is necessitated. No other scripture in this world helps one reach state of enlightenment.