Chapter 17 · Verse 26·Spoken by Krishna
सद्भावे साधुभावे च सदित्येतत्प्रयुज्यते।प्रशस्ते कर्मणि तथा सच्छब्दः पार्थ युज्यते
sad-bhāve sādhu-bhāve cha sad ity etat prayujyate praśhaste karmaṇi tathā sach-chhabdaḥ pārtha yujyate
The word "Sat" is used in the sense of existence and goodness. So too, Arjuna, the word "Sat" is applied to an auspicious act.
Word by Word
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Sanskrit recitation by Swami Brahmānanda
Audio from the Gītā Supersite, IIT Kanpur
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Convergence
he verse explains the third word of the sacred formula Om Tat Sat: the word 'sat' (literally 'being' or 'the existent'). Krishna says it carries two basic meanings. First, 'sad-bhava', the sense of real existence or 'is-ness', as when we say a thing has come into being. Second, 'sadhu-bhava', the sense of goodness, as when we call someone or something good. Several commentators add that 'sat' is a recognized name of Brahman, the ultimate reality, drawn from scripture (the well-known line 'In the beginning, dear one, this was Being alone'). So when the word 'sat' is spoken in either sense, it is in fact sounding a name of the Absolute.
Braided from 13 commentators
Śaṅkarācārya · Madhusūdana Sarasvatī · Śrī Nīlakaṇṭha · Dhanapati Sūri · Rāmānujācārya · Vedānta Deśika · Vallabhācārya · Śrīdhara Svāmī · Śrīla Viśvanātha · Śrīla Baladeva · Swami Sivananda · Swami Ramsukhdas · Sant Jñāneśvar
Krishna then extends the word's reach to action: 'sat' is also fittingly used for a praiseworthy, auspicious deed (prashasta karma). The commentators give the same everyday examples: a marriage, the sacred-thread ceremony, and other blessed observances. The point is that we naturally call a good act a 'sat' act. Because the same word is a name of Brahman, naming a deed 'sat' quietly links that deed to the real and the good, marking it as well-done and worthy.
Braided from 12 commentators
Śaṅkarācārya · Madhusūdana Sarasvatī · Śrī Nīlakaṇṭha · Dhanapati Sūri · Rāmānujācārya · Vedānta Deśika · Vallabhācārya · Śrīdhara Svāmī · Śrīla Viśvanātha · Śrīla Baladeva · Swami Sivananda · Swami Ramsukhdas
Several commentators draw out the practical force behind this naming: uttering 'sat' over an act has a repairing or completing power. Because 'sat' supplies what was lacking, it makes a sacrifice or other good work fruitful, swift, and unobstructed; where a defect would have spoiled an otherwise good action, the word 'sat' frees it of the defect and brings it to a successful, perfect end. So the word is not a mere label but works to lift the deed toward sat-hood, toward the real and the good.
Madhusūdana Sarasvatī · Śrīdhara Svāmī · Swami Sivananda · Sant Jñāneśvar · Śrīla Baladeva
Divergence
Advaita Vedānta
These commentators stress that 'sat', strictly speaking, names Brahman alone, the one reality that is unchanging amid the changing and exists in past, present, and future. When the word is used for an ordinary thing (a newborn son), for a person who has merely turned to good conduct, or for an auspicious act, it is being applied to what is only relatively real or relatively good. Brahman alone absolutely exists and is absolutely good; the borrowed use of 'sat' for worldly existence, goodness, and auspicious acts is meaningful precisely because all of these derive their reality from the one Existence. From the standpoint of the Absolute, the son or the deed never independently exists; 'sat' lends them whatever being and worth they have, which is also why uttering it can perfect a defective act.
Śaṅkarācārya · Madhusūdana Sarasvatī · Swami Sivananda
Bhakti
These devotional commentators read 'sat' through service to the Lord. 'Sad-bhava' is the state of being Brahman and 'sadhu-bhava' is the state of being a knower of Brahman; and steadfast abiding in sacrifice and the rest as one's aim is itself called 'sat'. Crucially, they single out the action done for the Lord's own sake, such as building, cleaning, and tending His temple, as deserving the name 'sat'. One source frames this as a standing injunction that the threefold designation Om Tat Sat is to be remembered, and cites the scriptural assurance that whatever falls short in a heedless rite is made complete by the very remembrance of Vishnu. The repairing power of the word is thus tied to remembrance of the Lord.
Śrīla Viśvanātha · Śrīla Baladeva · Sant Jñāneśvar
Dvaita
These commentators refuse to let 'sad-bhava' mean mere abstract existence. They take it to point to Brahman's power of bringing the world into being, the generation of beings, which is hinted at by the word. Sacrifices and the like are 'images of' Brahman and bear His name because of the sameness of the name, and so the sixth grammatical case here works in the sense of the instrumental. When one utters 'Om' without craving the fruit, aiming instead at Brahman with knowledge and devotion in the manner the Veda lays down, then, out of His exceeding love and the shared name, Brahman Himself comes to be established in the sacrifice and the work is accomplished. This account ties the whole Om Tat Sat passage together: the three names belong first to Brahman and only derivatively to the rites that image Him.
Madhvācārya · Śrī Jayatīrtha
Śuddhādvaita
These commentators give the verse a Pushtimarga (path of grace) reading. 'Sat' is not merely the predicate 'it exists' but the very name of Brahman as vyapaka, all-pervading, established by the scripture that He is all. Therefore using 'sat' in any good act or praiseworthy deed silently consecrates that act by acknowledging the Brahman who pervades it. One source spreads the word across three everyday usages, faith (astikya), goodness (sadhuta), and excellence (uttamata), plus every act aimed at the Lord, and concludes that even in ordinary speech, where a devotee calls a man 'sat' or an act 'sat', he is uttering the name of Brahman; the Lord's name thus runs through the whole of the devotee's day.
Vallabhācārya · Śrī Puruṣottama
Modern
This commentator opens the word out to all paths and forms without sectarian limit. 'Sad-bhava' is the sheer is-ness of the Supreme that never fails in any place, time, or thing, embracing all His forms, with attributes and without, with form and formless, and all His incarnations. 'Sadhu-bhava' is the exalted inner qualities, compassion, forgiveness, and the rest, cultivated in any tradition's discipline for reaching the Supreme. And 'prashasta karma' is read very widely: the good conduct prescribed in different traditions and the meritorious scriptural acts such as the sacred thread, marriage, and the giving of food, land, and cows, the digging of wells, and the building of rest-houses, temples, and gardens. To all of these the word 'sat' is rightly applied as sat-tattva, sad-guna, sad-achara, sat-karma, and sat-seva.
Swami Ramsukhdas
A Seeker Asks
If 'sat' is properly a name of the Absolute, what does it actually accomplish to speak it over a wedding or a defective ritual: is this real spiritual repair, or just pious labeling?
It is more than labeling because of what the word is. 'Sat' is a recognized name of Brahman, the one reality that truly exists and is truly good. So calling a deed 'sat' is not slapping on a compliment; it is aligning that deed with the real and the good, naming the very ground from which all existence and worth flow.
Śaṅkarācārya · Madhusūdana Sarasvatī · Rāmānujācārya · Vedānta Deśika · Swami Sivananda
The commentators speak of a genuine repairing power: the word supplies what was lacking, so that a good act marred by a defect is freed of the defect and brought to a successful, fruitful, unobstructed end. It is compared to medicine for the sick. The point is that the word lifts the deed toward sat-hood rather than merely describing it.
Madhusūdana Sarasvatī · Śrīdhara Svāmī · Swami Sivananda · Sant Jñāneśvar
But the repair is not magic words emptied of intention. Several commentators tie the power to right aim: uttering the name without craving the fruit, directed toward the Supreme, with remembrance and devotion. The completion comes because the act is reconnected, through the shared name, to the Lord it images, and out of His grace it is made whole. So it is real repair, but repair that lives in sincere orientation, not in lip-service.
Madhvācārya · Śrī Jayatīrtha · Śrīla Baladeva · Vallabhācārya
Contemplation
Let this verse widen what you are willing to call 'sat'. The word is not locked inside the formal rituals of a temple. It belongs to the sheer is-ness of the Supreme, who never fails in any place, time, or thing; it belongs to the good qualities you grow in your own heart, compassion, forgiveness, generosity, truthfulness; and it belongs to plain good deeds, giving food, giving water, sheltering people, planting a garden. So when you do an ordinary good act, do it as sat-karma and sat-seva, work offered toward the Real. You need not wait for a grand occasion. The everyday kindness, done well and aimed rightly, is itself touched by the name of the Supreme.
Sit with this · Swami Ramsukhdas
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