Tat-tvam-asi
(Skt., ‘That thou art’). One of the great sayings (
mah
v
kya
) which appears in
Ch
ndogya Upani
ad
(6. 8. 7, 6. 9. 4, 6. 14. 3): the sage Udd
laka instructs his son
vetaketu concerning Ultimate Reality (
Brahman
) immanent as the Self (
tman
) in all beings: ‘That which is the finest essence—this whole world has that as its self. That is Reality (satyam). That is the Self (
tman). That thou art,
vetaketu.’