How does one's perspective on worldly matters like sorrow and relationships change upon attaining supreme happiness?

Chapter 17 provides profound insight into the transformation that occurs with spiritual attainment. In the state of worldliness (Pravrutti), one experiences the duality of friends and enemies. However, in the state of cessation (Nivrutti), where one sees only the Self everywhere, such distinctions cease to exist. When supreme happiness is attained, the great sorrow of the body becomes insignificant. A person on this path becomes a 'mountain of courage,' unshaken even if 'mountains of worldly sorrow collapse upon him.' This indicates a complete shift from being affected by external circumstances to being rooted in the unchanging bliss of the Self.