In Book Three, Section 134 of the Masnavi, Rumi presents the Prophets' refutation of absolute determinism (jabr) through the medical metaphor of curable and incurable afflictions. The Prophets argue that while some ailments (such as congenital blindness) are inevitable and represent a divine decree that must be endured, God has provided remedies for many others (such as a headache). The very existence of medicine and cures demonstrates that God intends for human beings to exert effort (jahd) and exercise free will to seek solutions. The metaphor illustrates that humans should not passively use determinism as an excuse for inaction when spiritual or physical remedies are available.