4.13 The fourfold caste has been created by Me according to the differentiation of Guna and Karma; though I am the author thereof know Me as non-doer and immutable.
4.15 Having known this, the ancient seekers after freedom also performed action; therefore do thou also perform action, as did the ancients in days of yore.
4.16 What is action? What is inaction? As to this even the wise are confused. Therefore I shall teach thee such action (the nature of action and inaction) by knowing which thou shalt be liberated from the evil (of Samsara, the wheel of birth and death).
4.17 For verily (the true nature) of action (enjoined by the scriptures) should be known, also (that)
of forbidden (or unlawful) action, and of inaction; hard to understand is the nature (path) of action.
4.19 He whose undertakings are all devoid of desires and (selfish) purposes and whose actions have been burnt by the fire of knowledge, him the wise call a sage.