One of the oldest religions, third biggest religion, warships many gods, eternal spirit is called Brahman which is the most important god, believes every soul wants to be reunited with Brahman they achieve this by reincarnation, reincarnation is being reborn after ever-life which makes the soul more pure each time. They also perform there duty to make sure their lives are better [ Dharma .] Each caste has its own dharma, and they believe if they have a good karma they'll be closer to Brahman in their next life.