In second chapter Lord Krishna has given the wisdom of Sankhya to attain the equanimity which is to be acquired through Discipline f Action where in action is action is performed without any selfish motive. In Third Chapter on asking of Arjun about doing savage deed (war) even after the superiority of knowledge to action, Lord lays emphasis on the performance of ation where are two important factors
(1) Performance of Action and
(2) Special Knowledge about Action.
Here the Arjuna wants to renounce the 'Performance of Action'.