Aphorism 3: Brahman is the source of all knowledge
Brahman (Om ithyekaaksharam Brahman).” The cosmos is composed fully of the Om (pranava). It is also said, “This Atma is Brahman.” Therefore, Atma, Brahman, and Om are all indistinguishably the same. Knowledge of Brahman teaches that the Self in each living being, the Atma, is Brahman itself, and no less. The Brahma Sutras reveal that the outer universe (which has Brahman as the base) and the inner universe (antar-jagath) are identical and cannot be differentiated.