अश्रद्धया हुतं दत्तं तपस्तप्तं कृतं च यत्।
असदित्युच्यते पार्थ न च तत्प्रेत्य नो इह।।17.28।।
।।17.28।। हे पार्थ जो यज्ञ? दान? तप और कर्म अश्रद्धापूर्वक किया जाता है? वह असत् कहा जाता है वह न इस लोक में (इह) और न मरण के पश्चात् (उस लोक में) लाभदायक होता है।।
Since the performance of all Vedic activities are exclusively for the propitiation and worship of the Supreme Lord Krishna and any of His avatars or authorised incarnations and expansions such activities are known as SAT. The Supreme Lord is celebrated and glorified by His triplicate names of OM TAT SAT. The Vedic hymns and mantras gain power when OM TAT SAT are vibrated at their commencement and lose power if they are omitted at the end. Any hymns, chants or mantras sacred incantations recited without first uttering OM TAT SAT are known as a-sura or void of light and non- luminous. Also recitation of OM TAT SAT without comprehensively understanding its meaning bestows little faith and has meagre value. Similarly chanting Vedic mantras without knowing their meaning is worthless because Vedic mantras protect those who know the meaning reciting them as well as those who know the meaning and hear them and because of this they are known as mantras. Therefore an aspirant for advancement should always be cognizant of the meaning of the mantras during chanting and hearing. This has been revealed in the Paingi scripture. The performance of Vedic activities and the chanting of Vedic mantras while cognizant of their meaning without any expectation of reward are known as sura or luminous and enlightened. Therefore only activities performed in devotion and connected to the Supreme Lord are deemed SAT and are of the nature of perpetual goodness. All other actions contrary to this are known as asat. Activities in raja guna the mode of passion are also included as asat due to the defect of self-motivated desires which keeps one in samsara the perpetual cycle of birth and death. Actions in tama guna the mode of ignorance are situated in asat as well due to a comatose state of nescience and causes one to descend into the inferior hellish worlds. Only by being established and situated in sattva guna the mode of goodness is a jiva or embodied being redeemed which leads to atma tattva realisation of the immortal soul, moksa freedom from material existence and attaining communion with the Supreme Lord. Therefore to receive salvation one should eternally perform prescribed Vedic actions in sattva guna which always pleases the Supreme Lord Krishna.