The Mahavakyas are the Great Sentences of Advaita Vedanta and Jnana Yoga, and are contained in the Upanishads. Maha is Great, and Vakyas are sentences, or utterances for contemplation. The contemplations on the Mahavakyas also blend well with the practices of yoga meditation, prayer, and mantra… To truly understand the meaning of the mahavakyas it is necessary to practice contemplation and meditation in your own inner laboratory of stillness and silence.