Inner spirit, the consciousness existing inside human beings is our soul atman, God Almighty existing in us in miniscule form. As detailed in Hinduism sacred texts we are primarily is spiritual being undertaking cosmic journey.
As a spirit we manifest human form to cleanse self of dross impurities within. The human form is but a medium for spirit within to work out its karma, reach state of absolute purity. The human form had no identity of one’s own. After death of body the spirit within would manifest a new form!
The whole visible cosmos (Brahmaand in Hinduism) was a manifestation of this spirit existing in all living beings. This spirit called a soul atman initially manifests form of amoeba (single cell formation) subsequently evolving into multi-cell formation, insect life, plant life, animal life and finally the human form. The cosmic journey ends when human beings gained enlightenment.
Reaching state of enlightenment by human beings announced liberation from cycle of birth and death for soul atman within. The liberated soul atman now becomes free to venture into any part of cosmos at will.
As per doctrine of spirituality detailed in Bhagavad Gita, every single human being on mother earth, the spirit within has to reach state of enlightenment. Whether we do it now in present life or leave it for future manifestations is purely our prerogative.
God Almighty ordained a long journey of 1.1 million manifestations in human form to reach state of enlightenment. To endlessly rotate in the cycle of birth and death is not wise. Prime reason why Mahavira, Gautama Buddha even Jesus Christ and Prophet Mohammed decided to end this cycle! In the last about 150 years amongst 7 billion people existing world over even Sri Ramakrishna Paramhansa and Maharshi Ramana finally decided to become a pure soul atman.
As we are primarily a spiritual traveler, it is in our interest to indulge in spirituality to reach cosmic end of life, 8.4 millionth manifestation… the state when after gaining enlightenment one liberates from cycle of birth and death forever.
Many people world over did not believe in existence of spirit within human beings nor in existence of god. But presence of this spirit within our heart can be realized by practicing truthfulness. When we were 100% truthful, we could easily hear promptings of this spirit, consciousness coming from within. All spiritual travelers did this all the time.