In Advaita Vedanta and Jnana Yoga Nididhyasana (Sanskrit: निदिध्यासन) is profound and repeated meditation on the mahavakyas, great Upanishadic statements such as “That art Thou”, to realize the identity of Atman and Brahman
It is the fourth step in the training of a sisya (disciple), consisting of preparatory practices, listening to the teachings as contained in the sruti, reflection on the teachings, and nididhyasana