आरुरुक्षोर्मुनेर्योगं कर्म कारणमुच्यते ।योगारूढस्य तस्यैव शमः कारणमुच्यते ॥
ārurukṣormuneryogaṃ karma kāraṇamucyateyogārūḍhasya tasyaiva śamaḥ kāraṇamucyate
For a sage who is ascending the hill of Yoga, action is the cause; for the same sage when he has got to the top of Yoga self-mastery is the cause.
Gītā 6·3Works are to be done, but with what purpose and in what order? They are first to be done while ascending the hill of Yoga, for then works are the cause, kāraṇam. The cause of what? The cause of self-perfection, of liberation, of nirvana in the Brahman; for by doing works with a steady practice of the inner renunciation this perfection, this liberation, this conquest of the desire-mind and the ego-self and the lower nature are easily accomplished.
But when one has got to the top? Then works are no longer the cause; the calm of self-mastery and self-possession gained by works becomes the cause. Again, the cause of what? Of fixity in the Self, in the Brahman-consciousness and of the perfect equality in which the divine works of the liberated man are done.