What is the connection between renouncing desires and attaining the bliss of Brahman?

Chapter 37 establishes a direct link between the renunciation of desires and spiritual liberation. It teaches that the cycle of worldly existence, or samsara, is propelled by desires. When these desires are destroyed at the root, the 'knot in the heart' is untied. This leads to a state called 'Viraja,' which is beyond righteousness and unrighteousness and is the destroyer of ignorance. The text explicitly states that 'The renunciation of desires is the union with the bliss of Brahman.' This union signifies the attainment of the heart's ultimate goal, the realization of Parabrahman, and is the means by which a 'knower of the Self crosses sorrow.'