Which deals with the origin and nature of knowledge?

The Baha'i Faith is a distinct religion that originated in the 19th century, focusing on the teachings of Baha'u'llah. While it emphasizes unity and draws from various religious traditions, it does not include the Vedas or Upanishads as part of its sacred texts, which are primarily based on the writings of Baha'u'llah and other Baha'i leaders.

Islam is centered around the Quran, which is considered the ultimate revelation from God to the Prophet Muhammad. The Vedas and Upanishads are not recognized within Islamic theology, as they belong to a completely different religious tradition with differing beliefs and texts.

Judaism's sacred texts include the Torah and other writings, with a focus on the covenant between God and the Israelites. The Vedas and Upanishads do not play any role in Jewish religious practice or belief, as they originate from the Hindu tradition.

Confucianism is a philosophical system based on the teachings of Confucius, primarily concerned with morality, social relationships, and justice. It does not incorporate the Vedas or Upanishads, which are specific to Hinduism and its spiritual practices.