ハタ・ヨーガ
The "Yogatattva Upanishad" shares ideas with the Yogasutra, Hatha Yoga, and Kundalini Yoga. It includes a discussion of four styles of yoga: Mantra, Laya, Hatha yoga and Raja. As an expounder of Vedanta philosophy, the Upanishad is devoted to the elaboration of the meaning of Atman (Soul, Self) through the process of yoga, starting with the syllable Om. According to "Yogatattva Upanishad", "jnana (knowledge) without yoga cannot secure moksha (emancipation, salvation), nor can yoga without knowledge secure moksha", and that "those who seek emancipation should pursue both yoga and knowledge".