यज्ञे तपसि दाने च स्थितिः सदिति चोच्यते।
कर्म चैव तदर्थीयं सदित्येवाभिधीयते।।17.27।।
17.27 And the steadfastness in sacrifice, austerity and charity is spoken of as sat. And even the action meant for these is, verily, called as sat (good).
17.27 Therefore, devotion of persons of the first three stations who follow the Vedas in respect of sacrifices, austerities and gifts is called Sat, since it is auspicious. So the Vedas, Vedic acts and the three stations, expressed by the term brahmana, since they are characterised by their connection with the words Om Tat Sat, are to be distinguished from what are not the Vedas and Vedic.
Yajne tapasi daane cha sthitih saditi chochyate; Karma chaiva tadartheeyam sadityevaabhidheeyate.
sat-bhāve—with the intention of eternal existence and goodness; sādhu-bhāve—with auspicious intention; cha—also; sat—the syllable Sat; iti—thus; etat—this; prayujyate—is used; praśhaste—auspicious; karmaṇi—action; tathā—also; sat-śhabdaḥ—the word “Sat”; pārtha—Arjun, the son of Pritha; yujyate—is used; yajñe—in sacrifice; tapasi—in penance; dāne—in charity; cha—and; sthitiḥ—established in steadiness; sat—the syllable Sat; iti—thus; cha—and; uchyate—is pronounced; karma—action; cha—and; eva—indeed; tat-arthīyam—for such purposes; sat—the syllable Sat; iti—thus; eva—indeed; abhidhīyate—is described