एवं ज्ञात्वा कृतं कर्म पूर्वैरपि मुमुक्षुभिः।
कुरु कर्मैव तस्मात्त्वं पूर्वैः पूर्वतरं कृतम्।।4.15।।
4.15. Realizing in this fashion, action had been under-taken also by ancient seekers of salvation. Hence, you too should perform, by all means, the more ancient action that had been performed by the ancients.
4.15 Evam etc. Therefore being purified by this [sort of] conviction you too should perform actions that are to be necessarily performed. But, if it is said that success would result just from the non-performance of action, that is not correct. For -
Evam jnaatwaa kritam karma poorvair api mumukshubhih; Kuru karmaiva tasmaat twam poorvaih poorvataram kritam.
evam—thus; jñātvā—knowing; kṛitam—performed; karma—actions; pūrvaiḥ—of ancient times; api—indeed; mumukṣhubhiḥ—seekers of liberation; kuru—should perform; karma—duty; eva—certainly; tasmāt—therefore; tvam—you; pūrvaiḥ—of those ancient sages; pūrva-taram—in ancient times; kṛitam—performed