O best of the Kuru dynasty, without sacrifice one can never live happily on this planet or in this life: what then of the next?
Author Name:-Sri Ramanuja
Purport
Sri Ramanuja
4.31 He ‘who offers no sacrifices,’ i.e., he who does not devote himself to obligatory and occasional actions, preceded by the performance of the ‘great sacrifices’ etc., will not be able to achieve human ends which are associated with the material world and are called by the names of virtue, wealth and worldly satisfactions. How then can the man’s supreme end called release (Moksa), which is other than these, be attained? As Moksa, man’s supreme end, has been mentioned, other objectives different from it, are named ‘this world.’ That is, indeed, the material world. [Perhaps the idea is that all types of sacrificers should perform the Panca-Maha-Yajnas, and take the remnants of it as their daily food. Only in this way can we give some meaning to ‘ambrosial food’ connected with the performance of all the various kinds of sacrifice mentioned in the above verses.]
Author Name:-Sri Adi Shankaracharya
Purport
Sri Adi Shankaracharya
4.31 Yajna-sista-amrta-bhujah, those who partake of the nectar left over after a sacrifice, i.e. those who, after performing the sacrifices described above, eat, during the leisure after the sacrifice, the food called nectar, as prescribed by the injunctions; yanti, reach; sanatanam brahma, the eternal Brahman. For the sake of consistency (with the Upanisads) it is understood that if they (the sacrificers) are seekers of liberation, (then they reach Brahman) in due course of time. [The Upanisads describe the different stages through which those who do good deeds and practise meditation have to pass before reaching the qualified Brahman after death. For liberation there is need also of purification of the heart, Thus, they reach Brahman by stages, and not immediately after death. (See Ch. 8.5 and subsequent portion; also, Br. 4.3.35 to 4.4.25, etc.)] Even ayam lokah, this world, common to all beings; na asti, ceases to exist; ayajnasya, for one who does not perform sacrifices, for him who does not have to his credit even a single one of the above sacrifices. Kutah anyah, what to speak of the other world which can be achieved through special disciplines; kurusattama, O best among the Kurus!
Author Name:-Sri Madhvacharya
Purport
Sri Madhavacharya
By diminishing the intake of food the influence of the senses are greatly reduced due to weakness of body. The speech is also so diminished as well. Knowing that the senses and tongue which governs both eating and speaking are all subservient to the mind as revealed in the Vedic scriptures, one of controlled mind should only eat what has been ordained and sanctified in yagna or offerings of worship to the Supreme Lord according to the injunctions of the Vedic scriptures otherwise there is no hope for redemption in this world or the next.
Now begins the summation.
Due to yagna and propitiation to the Supreme Lord are the restraint of the senses achieved. By considering that such efforts are the sole purpose of existence one should wholeheartedly engage in yagna without reservation. One should consider one’s life as the oblation offered to the Supreme Lord in full surrender following the injunctions recommended in the Vedic scriptures. In the Brahma Vaivartaka Purana it states that one should realise the Supreme Lord as the yagna and propitiate Him with body, mind and words. When the Brahman or the spiritual substratum pervading all existence has been perceived then the relation between the performer, the activity performed, the recepient of the performance and the result of the performance are all factually not separate from the Supreme Lord one will then experience the actual presence of the Supreme Lord everywhere in all situations.