The Upaniṣads — the philosophical core of the Vedic tradition, revealing the nature of Brahman, the Ātman, knowledge, action and liberation. The ten principal Upaniṣads together with select minor Vaiṣṇava Upaniṣads.
An examination of the syllable Oṃ part by part: where to begin, what to contemplate, and who contemplates. Śaiva in language, it ends with the promise of never again dwelling in a womb — that is, of not being born again.