In Book Five of the Masnavi, Rumi uses the historical narrative of the Prophet Muhammad's intense distress during the pause in revelation (fatra al-wahy) to expound on the mystical concept of self-sacrifice (fada). Rumi suggests that while ordinary people might be astonished by those who sacrifice their lives (fada'is) for worldly causes, every human being is inherently sacrificing their energy, time, or life to some specific habit, character, or pursuit. He argues that true spiritual felicity belongs to those who consciously choose to sacrifice their physical existence ('tan') for the ultimate divine reality, which is the only goal truly worthy of such ultimate devotion and surrender.