‘Consider those who in the course of many lives on earth have become free from desire. By this we mean that all their desires have found fulfillment within the soul itself. They do not die as others do. Since they understand God, they merge with God.
‘When all the desires clinging to the heart fall away, the mortal becomes immortal. When all the knots of desire strangling the heart are loosened, liberation occurs.
‘As the snake discards its skin, leaving it lifeless on an anthill, so the soul free from desire discards the body, and unites with God – who is eternal life and boundless light.’
- Brihadaranyaka Upanishad 4:4.6b