Sūta said: Siddhis are accomplished only in a pure and not in an impure person. A person of holy rites who is satisfied with the sustenance he gets by justifiable means has the characteristics of satiety (tuṣṭi). He is not worried about his needs. Austerity is the right observance of the holy rites Cāndrāyaṇa, etc, Svādhyāya is the threefold repetition of Oṃkāra mantra, i.e. (1) Vācika—oral utterance which is the basest of the three; (2) Upāṃśu—slow muttering which is better than Vācika; (3) Manasa—when the sound does not come out of the throat which is the best of all. This is stated in detail in the ritualistic text on the five-syllabled mantra.