The Atma Bodha Upanishad (आत्मबोध उपनिषद्) is a minor Upanishad attached to the Rigveda. It expounds the nature of the Self (Atman) and its identity with Brahman, presenting teachings on Pranava (Om), the heart-lotus as Brahmapura, and a series of profound declarations of Self-knowledge (Aham-pratyaya).