तत्रैवं सति कर्तारम् आत्मानं केवलं तु यः ।पश्यत्यकृतबुद्धित्वान् न स पश्यति दुर्मतिः ॥
tatraivaṃ sati kartāram ātmānaṃ kevalaṃ tu yaḥpaśyatyakṛtabuddhitvān na sa paśyati durmatiḥ
That being so, he verily who, owing to ignorant understanding, looketh on the pure Self as the doer, he of perverted intelligence, seeth not.
Gītā 18·16The doer is ordinarily supposed to be our surface personal ego, but that is the false idea of the understanding that has not arrived at knowledge. The ego is the ostensible doer, but the ego and its will are creations and instruments of Nature with which the ignorant understanding wrongly identifies our self and they are not the only determinants even of human action, much less of its turn and consequence. When we are liberated from ego, our real self behind comes forward, impersonal and universal, and it sees in its self-vision of unity with the universal Spirit universal Nature as the doer of the work and the Divine Will behind as the master of universal Nature.