4.19 In the case of an aspirant for release, all undertakings of actions in the form of obligatory, occasional and desiderative acts accomplished through the acisition of materials for their performance as also other works, are free from desire, i.e., are devoid of attachment to fruits. They are devoid of delusive identification. If the mind identifies the self with Prakrti and its Gunas, it is Sankalpa, i.e., 'delusive identification.' Genuine Karma Yoga is free from such identification. Such identification is overcome through contemplation on the real nature of the self as different from Prakrti. Those who know the truth call him a sage, who acts in this way and whose previous Karmas are thery burnt up by the fire of knowledge of the real nature of the self generated along with his actions. He is a true Karma Yogin.

Thus that knowledge is involved in true Karma Yoga, is established.

Sri Krsna elaborates this point again: