Hindus believe in reincarnation. I it explains the natural way the soul evolve from immaturity to spiritual enlightenment. Life and death are realities for all of us. Hinduism believes that the soul is immortal, that it never dies, but inhabits one body after another on the Earth during its journey. Like the caterpillar's transformation into a butterfly, physical death is a natural transition for the soul, which survives and, guided by karma, continues its long pilgrimage until it is one with God. After many lifetimes of following karma, the soul is fully matured in love, wisdom and knowledge of God. There is no longer a need for physical birth, for all lessons have been learned, all karmas fulfilled. That soul is then liberated, freed from the cycle of birth, death and rebirth. Evolution then continues in the more refined spiritual worlds. Similarly, after we graduate from elementary school we never have to go back to the fifth grade. We have gone beyond that level in understanding. Karma plays an important role in this evolution by determining how a person’s soul is transferred to another being. If a person does good deeds and has a good conscious their soul enters the next higher stage of its journey. For example: if it is already human than the next stage would be a human in a higher caste, or if they do bad deeds and have corrupt conscious their soul is “downgraded) to a lower stage in its journey. This Hindu view of the soul's evolution answers many otherwise bewildering questions, removing the fear of death while giving assurance that each soul is evolving toward the same spiritual destiny, for the Hindu believes that karma and reincarnation are leading every single soul to God Realization. Another “tool” that Hindus use other than practicing good karma is Yoga. Yoga helps them achieve this by bringing people’s minds and soul closer to an enlightened state. This state is gained through meditation and working up the spine through chakras (subtle energy centers). This done properly and devotedly has the desired effect of bringing one’s self to an enlightened state or union with their true self.