jarā-maraṇa-mokṣhāya mām āśhritya yatanti ye
te brahma tadviduḥ kṛitsnam adhyātmaṁ karma chākhilam
They who, refuged in Me, strive for liberation from birth and death, they know the Eternal, the whole Self -knowledge, and all action.
In plain words: Krishna says those who take shelter in him and work to be free from the cycle of birth and death come to know the Eternal, the true Self, and the nature of all action.