In Book Five of Jalaluddin Rumi's Masnavi, the imprisonment of the heavenly intellect ('aql) and spirit (ruh) within the physical human body ('water and clay') is compared to the fallen angels Harut and Marut bound in the well of Babylon. Rumi explains that this imprisonment is not an arbitrary punishment, but a necessary condition for divine trial (imtihan or ibtila). True spiritual trial requires free will (ikhtiyar) and agency (iqtidar). He uses the metaphor of dormant dogs to describe human desires that lie quietly within the body until external temptation awakens them, illustrating that human potential for both good and evil remains latent until tested under the constraints of physical existence.