611. I do not follow Nilakantha in rendering this verse.
612. The soul is said to be only a witness or spectator and not an actor. The Rishis understood by the soul the being to whom the mind, the senses, etc., all belong. Could the idea of the inactive and unsinning Soul have arisen from observation of the moral principle of Conscience which discriminates between right and wrong, and acts, therefore, as an impartial judge, or watches everything like an uninterested spectator? European moralists generally attribute two other functions to the Conscience, viz., impelling us to do the right and avoid the wrong, and approving when right is done and wrong avoided. But these functions may easily be attributed to some other principle. At any rate, when the question is one of nomenclature only, the last two functions may be taken away and the word Soul applied to indicate the Conscience as the faculty of discrimination only.
613. The qualities here referred to are those of Sattwa (goodness), Rajas (passion), and Tamas (darkness). What is meant by this verse is that such a person transcends the qualities instead of the qualities transcending him and his acts.
614. Nilakantha takes the third line as elliptical and is for supplying te labhante.
615. I follow the commentator in his exposition of this verse. Anavisandhipurvakam is explained as nishkamam. Ubhayam is prachinamaihikam cha karmam. Apriyam is equivalent to vadham. The substance of priyam, etc., is thus given: Moksham prati tu karmanah karanatwam duranirastam.
616. Aturam is explained as pierced by lust, wrath, etc. Asuyate is equivalent to dhikkaroti. Janah is explained by the commentator as parikshakah but it would be better to take it as standing for people generally. Tasya is an instance of the genitive for the accusative. Tat refers to nindyam karma, sarvatah means sarvashu yonishu. Janayati Janena dadati. The object of the verse is to show that sinful acts produce fear both here and hereafter.
617. Loka is in the locative case, the final vowel indicating to the locative having been dropped for sandhi. Niravishan is an adverb, equivalent to samyak-abhinivesam kurvan. Tattadeva means "those and those" i.e., possessions, such as putradaradikam. Kusalan is sarasaravivekanipunan. Ubhayam is explained as karma-mukhin and sadyomuktim. Bhisma here points out the superiority of the latter kind of Emancipation over the former; hence Vedic acts or rites must yield to that yoga which drills the mind and the understanding and enables them to transcend all earthly influences.
618. The soul-state is the state of purity. One falls away from it in consequence of worldly attachments. One may recover it by yoga which aids one in liberating oneself from those attachments.
619. The three words used here are vichara, viveka, and vitarka. They are technical terms implying different stages of progress in yoga. The commentator explains them at length.
620. Everything that man has is the product of either exertion or destiny; of exertion, that is, as put forth in acts, and destiny as dependent on the acts of a past life or the will of the gods or pure chance. Yoga felicity is unattainable through either of these two means.