In Farid al-Din Attar's Elahi Nameh, the 'Tale of the King and the Ring' explores the theme of impermanence and the necessity of spiritual equanimity. The king requests a ring with a special inscription designed to bring him joy when he is sorrowful, and sorrow when he is joyful (often associated with the concept of 'This too shall pass'). This allegory teaches that all worldly emotions, fortunes, and conditions are transient. By internalizing this truth, the spiritual seeker can cultivate detachment from fleeting worldly states and maintain focus on the eternal divine reality, remaining untroubled by the inevitable fluctuations of life.