For example, a Brahmin is initiated into school to study and pursue Brahmopadesha (preach, counsel) in the matter of the nature of Brahman, the ultimate reality.
[4] The premise of the Dvija concept was that a person is born physically through his parents at home, spiritually through his teacher at school (gurukul) who helps the student form the mind and realize the self.
[5][6] The word Dvija, and its equivalent such as Dvijati, is neither found in any Vedas, any Upanishad, nor in any Vedanga literature such as the Vyakarana, Shiksha, Nirukta, Chandas, Shrauta-sutras or Grihya-sutras.
[7][note 1] This, states Patrick Olivelle, suggest that Dvija is not a Vedic or ancient tradition of Hinduism, but an innovation that appeared sometime in the 1st millennium CE.
[citation needed] This Dvija-ceremony was recommended in medieval era texts for the Brahmins (priests and teachers), Kshatriyas (warriors), and Vaishyas (merchants) before they began their schools.
[citation needed] The Hindu texts offer a conflicting view of whether access to guru and education was limited to men and to certain varna (social classes or castes).
[9][10] The Brahmanical centres of learning were open to all the Dvija castes, states Romila Thapar, and they "appear to have attracted mainly the Brahmin students".
[12][13][14] In practice, state Stella Kramrisch and others, the guru tradition and availability of education extended to all segments of ancient and medieval society.