Hatha Yoga Pradipika examining Buddhist tantric commentaries and medieval yoga texts that came before the "Hatha Yoga Pradīpikā", Birch found that the adverbial uses of the word suggests that it meant "force". Birch found that, "Rather than the metaphysical explanation of uniting the sun (ha) and moon (ṭha), it is more likely that the name haṭha yoga was inspired by the meaning 'force'." Hatha Yoga Pradipika The Hatha Yoga Pradīpikā ( or Light on Hatha Yoga) is a classic fifteenth-century Sanskrit manual on hatha yoga, written by "Svāmi" Svātmārāma, who connects the teaching's lineage to Matsyendranath of the Nathas. It is among the
Vedas and "Know your Ātman" their thematic focus. The Upanishads are the foundation of Hindu philosophical thought and its diverse traditions. Of the Vedic corpus, they alone are widely known, and the central ideas of the Upanishads have influenced the diverse traditions of Hinduism. "Aranyakas" are sometimes identified as "karma-kanda" (ritualistic section), while the Upanishads are identified as "jnana-kanda" (spirituality section). In an alternate classification, the early part of Vedas are called Samhitas and the commentary are called the Brahmanas which together are identified as the ceremonial "karma-kanda", while "Aranyakas" and "Upanishads" are referred to as the "jnana-kanda". The Vedangas developed