ŚVETĀŚVATARA UPANISHAD · 5.12

स्थूलानि सूक्ष्माणि बहूनि चैव रूपाणि देही स्वगुणैर् वृणोति ।
क्रियागुणैर् आत्मगुणैश् च तेषां संयोगहेतुर् अपरो ऽपि दृष्टः ॥

sthūlāni sūkṣmāṇi bahūni caiva rūpāṇi dehī svaguṇair vṛṇoti ।
kriyāguṇair ātmaguṇaiś ca teṣāṃ saṃyogahetur aparo ’pi dṛṣṭaḥ ॥

That incarnate Self, according to his own qualities, chooses (assumes) many shapes, coarse or subtile, and having himself caused his union with them, he is seen as another and another, through the qualities of his acts, and through the qualities of his body.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)