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。
On contemplation: where to begin, where to hold attention, how to breathe, and what to do with distraction. The book begins with sin, called a mountain, and ends with the vision of Puruṣa.