Abbas Mahmoud Al-Aqqad's seminal work, "Thinking is an Islamic Obligation," delves into the profound relationship between faith and reason within Islam. Al-Aqqad passionately argues that critical thought and intellectual inquiry are not merely permissible but are, in fact, fundamental duties for every Muslim. The book challenges prevailing notions that might suggest a conflict between religious devotion and rational investigation, asserting that the Quran and Sunnah actively encourage reflection, analysis, and the pursuit of knowledge. It posits that a vibrant Islamic civilization is built upon the pillars of enlightened minds and continuous intellectual engagement, making a compelling case for the indispensable role of independent thought in understanding and living by Islamic principles. This work remains a powerful testament to Al-Aqqad's intellectual legacy and his enduring commitment to progressive Islamic thought.