The Mukhya Upaniṣads

Maitrī · Prapāṭhaka 2 · Maitrī 2.1

Passage 10

स वा एष आत्मेत्यदो वशं नीत इव सितासितैः कर्मफलैरभिभूयमान इव प्रतिशरीरेषु चरत्यव्यक्तत्वात्सूक्ष्मत्वाददृश्यत्वादग्राह्यत्वान्निर्ममत्वा च्चानवस्थोऽकर्ता कर्तेवावस्थितः ॥२.१० ॥

In plain words

This Self, as though brought under sway, as though overcome by the bright and dark fruits of deeds, moves among bodies one after another; and because it is unmanifest, subtle, unseen, ungraspable and free of any sense of mine, it is without standing-place and is no doer, though it stands as though it were a doer.