14.26 Mam ca etc.  By this  [verse the Lord]  teaches the basic means.  Here the word ca has been used in the sense of affirmation in exclusion of all other  things.  [So the meaning  is] : 'He, who serves Me exclusively'.  Hence, craving for fruits etc.  [of action], whosoever takes hold of that fruit as his principal aim, but Me (the Supreme) as a subsidiary one-he is excluded by this interpretation. Because the devotion of this person is not unfailing.  For, he has consideration for fruit  [alone].  On the other hand, he who does not entertain any desire for any fruit; who, even when estioned  [by somody as]  'Why do you under-take this desagreeable (foolish)  act ?'  would give reply by silence alone, shedding tears that roll on his both the eyes wide open,  and having shake in body and bodily hair thrilled-[all] due to his internal organ,  agitated on account of being struck by the incessant devotion towards  the Bhagavat-it should be born in mind that this person alone, not anybody else, in purified by the unfailing devotion which is  (nothing but)  the foremost  Energy  (Grace) of the Bhagavat, the Supreme Lord.