Bhagavad Gita · Karma YogaChapter 3, Shloka 18 (3.18)

Three "nots". (1) No gain from acting; (2) no loss from not acting; (3) no selfish dependence on any being.

Shankaracharya: from not acting there is no pratyavāya (the fault of neglecting duty), nor ātma-hāni (harm to the self). He has nothing to achieve by relying on any being, from Brahma down to the plants and stones. And then Shankara adds an important point: na tvam etasmin sarvataḥ-samplutodaka-sthānīye samyag-darśane vartase — "you (Arjuna) are not yet established in this right vision, which is like a reservoir full on all sides." That is, this is not Arjuna's state; hence the next verse: "you must act."

Acharya Ramanuja: Such a person has no purpose to serve by practising the means to the vision of the self, and no loss in not practising them — because his vision of the self is asādhanāyatta — not dependent on means. Sa hi mukta eva — he is indeed liberated. Then Ramanuja gives the conclusion of this section: since only such a perfected one does not need the means; and since karma-yoga is suśaka (easy), apramāda (free from error), contains knowledge of the self within it, and is necessary even for the jnana-yogi to keep the body going — therefore karma-yoga eva ātma-darśana-nirvṛttau śreyān — karma-yoga is the best for attaining the vision of the self.