education than their mere mechanical repetition and correct pronunciation." Mookei refers to Sayana as stating that "the mastery of texts, akshara-praptī, is followed by artha-bodha, perception of their meaning." Mukherjee explains that the Vedic knowledge was first perceived by the rishis and munis. Only the perfect language of the Vedas, as in contrast to ordinary speech, can reveal these truths, which were preserved by committing them to memory. According to Mukherjee, while these truths are imparted to the student by the memorized texts, "the realization of Truth" and the knowledge of paramatman as revealed to the rishis is the real aim of Vedic learning, and not the mere recitation of texts. The supreme knowledge of the Absolute, para Brahman-jnana, the knowledge of rta and satya, can be obtained by taking vows of silence and obedience sense-restraint, dhyana, the practice of tapas (austerities), and discussing the Vedanta. Vedic schools or recensions The four Vedas were transmitted in various s (branches, schools). Each school likely represented an ancient community of a particular area, or kingdom. Each school followed its own canon. Multiple recensions are known for each of the Vedas. Thus, states Witzel as well as Renou, in the 2nd millennium BCE, there was likely no canon of one broadly accepted Vedic texts, no Vedic “Scripture”, but only a canon of various texts accepted by each school. Some of these texts have survived, most lost or yet to be found. Rigveda that survives in modern times, for example, is in only one extremely well preserved school of Śåkalya, from a region called Videha, in modern north Bihar, south of Nepal. The Vedic canon in its entirety consists of texts from all the various Vedic schools taken together. Each of the four Vedas were shared by the numerous schools, but revised, interpolated and adapted locally, in and after the Vedic period, giving rise to various recensions of the text. Some texts were revised into the modern era, raising significant debate on parts of the text which are believed to have been corrupted at a later date. The Vedas each have an Index or Anukramani, the principal work of this kind being the general Index or . Prodigious energy was expended by ancient Indian culture in ensuring that these texts were transmitted from generation to generation with inordinate fidelity. For example, memorization of the sacred Vedas included up to eleven forms of recitation of