The Mahavakyas (Great Sayings) are four profound declarations from the Upanishads that encapsulate the essence of Advaita Vedanta: the identity of the individual self (Atman) with the ultimate reality (Brahman). Each Mahavakya originates from a specific Upanishad. 'Prajnanam Brahma' (Consciousness is Brahman) is from the Aitareya Upanishad (3.3) of the Rigveda. 'Aham Brahmasmi' (I am Brahman) appears in the Brihadaranyaka Upanishad (1.4.10) of the Shukla Yajurveda. 'Tat Tvam Asi' (That Thou Art) is found in the Chandogya Upanishad (6.8.7) of the Samaveda.
'Ayam Atma Brahma' (This Self is Brahman) is from the Mandukya Upanishad (1.2) of the Atharvaveda. These mantras are not chanted for material benefits but for self-realization and liberation (moksha). They are considered beejahina (seedless) mantras, as they directly reveal the truth without the need for ritualistic seed syllables. The phonetics of each Mahavakya are designed to resonate with the consciousness of the practitioner, leading to a direct experience of non-duality. Traditionally, these mantras are chanted during meditation, especially in the early morning (Brahma Muhurta), with a clear mind and focused intention.
The recommended count is 108 repetitions per session, often using a rudraksha mala. They may also be recited during Vedantic study (svadhyaya) and spiritual discourses. No specific ritual setting is required, but a clean, quiet space is advised. There are no strict cautions, but these mantras are considered powerful and should be approached with reverence and a sincere desire for spiritual growth. They are central to the practice of jnana yoga and are often given by a guru to a qualified disciple.
The Mahavakyas are also referenced in later texts such as the Yoga Vasistha and the works of Adi Shankaracharya. Their purpose is to destroy ignorance (avidya) and reveal the unity of existence.
Consciousness is Brahman.