Final answer:
The Rig Veda mentions the mysterious power of the gods and explores metaphysical speculation about the universe. Hinduism believes in the cyclical nature of the universe and suggests purification as a means to break the cycle of reincarnation.
Step-by-step explanation:
The Rig Veda, an ancient Vedic text, mentions the mysterious power of the gods. It explores metaphysical speculation and cosmological theories about the origin of the universe. In Hinduism, it is believed that the universe is cyclical, mirroring the cycle of birth, death, and rebirth. The Rig Veda suggests that purification through ascetic rituals can help achieve freedom from the cycle of reincarnation.