651. The Chhandas are the rules of Prosody as applicable to the Vedic hymns. Jyotish is astronomy. It forms an Anga of the Vedas. Nirukta furnishes rules for interpreting obscure passages of the Vedas, and also gives the meanings of technical or obscure words used therein. Kalpa is the description of religious rites. Siksha is the science of pronunciation as applied to Vedic hymns and mantras.
652. They who believe that happiness is not eternal and that, therefore, they should not pursue it, withdraw themselves from pious acts which lead to that happiness. They seek Knowledge as the best means for avoiding all that is transitory and changeful. They seek moksha or complete Emancipation which has been described in the previous sections.
653. The meaning of 'hell' as applied in such passages has been explained before.
654. This is a highly aphoristic line. I give the sense by expanding the words. By 'acts' here is meant 'sacrifices and other religious observances.' The intention of Vrihaspati is to enforce the propriety of acts, for without acts, the ends of life cannot, he maintains, be secured.
655. The sense is that one should devote oneself to acts as a sort of preparation. Afterwards one should abandon them for obtaining the higher end. Acts, therefore, have their use, and help one, though mediately, in the acquisition of Brahma.
656. The mind and acts have created all things. This has been explained in the last verse of section 190 ante. Both are good paths, for by both, good end may be attained, viz., the highest, by drilling the mind, as also (mediately) by acts (as explained in verse 14 above). The fruits of actions must be mentally abandoned if the highest end is to be attained; i.e., acts may be gone through, but their fruits should never be coveted.
657. Nilakantha explains the grammar of the first line differently. His view is yatha chakshurupah praneta nayako, etc. A better construction would be yatha chaksha pranetah (bhavati) etc.
658. This verse may be said to furnish the key of the doctrine of karma or acts and why acts are to be avoided by persons desirous of Moksha or Emancipation. Acts have three attributes: for some are Sattwika (good), as sacrifices undertaken for heaven, etc., some are Rajasika (of the quality of Passion), as penances and rites accomplished from desire of superiority and victory; and some are Tamasika (of the quality of Darkness), as those undertaken for injuring others, notably the Atharvan rites of Marana, Uchatana, etc.: this being the case, the Mantras, without acts, cannot be accomplished, are necessarily subject to the same three attributes. The same is the case with rituals prescribed. It follows, therefore, that the mind is the chief cause of the kind of fruits won, i.e., it is the motive that determines the fruits, viz., of what kind it is to be. The enjoyer of the fruit, of course, is the embodied creature.
659. There can be no doubt that Nilakantha explains this verse correctly. It is really a cruce. The words Naro na samsthanagatah prabhuh syat must be taken as unconnected and independent. Na samsthana gatah is before death. Prabhuh is adhikari (jnanphale being understood). K.P. Singha gives the sense correctly, but the Burdwan translator makes nonsense of the words.
660. The subject of this verse as explained by the commentator, is to inculcate the truth that the result of all acts accomplished by the body is heaven where one in a physical state (however subtile) enjoys those fruits. If Emancipation is to be sought, it must be attained through the mind.