奥义书——吠陀传统的哲学核心，阐明梵、真我、知识、行动与解脱的本质。十部主要奥义书，另加精选的毗湿奴派小奥义书。
Yājñavalkya goes to the sun and brings back from there the science of seeing the light within: five spaces, their signs, their stages. It ends by speaking not of himself, but of others.