Before it meant “logic,” it meant “light.”
It’s tempting to translate ‘aql simply as “reason,” the way a modern secular vocabulary uses the word — a neutral faculty for deriving valid conclusions from premises. That translation quietly imports a modern assumption: that reason is what’s left over once revelation, intuition, and spiritual perception are stripped away.
Scholarship on early Islam identifies at least six distinct senses ‘aql carried across different traditions. A Qur’anic sense ties it to meditative reflection on God and remembrance of divine bounty, under submission to God’s authority. A Shi’i sense combines cosmic morality, an ethical-epistemological function, and “interior vision” of the divine. Sunni traditionalists split between rejecting reports about ‘aql as fabricated and accommodating it as a cultivator of ethical conduct. Kalam theology later narrowed it into discursive, argumentative reasoning — Mu’tazili and Ash’ari schools disagreed sharply over whether it should precede scripture or merely support it. In the philosophical (falsafa) tradition, al-Farabi mapped it onto an Aristotelian ladder of potential, actual, acquired, and active intellect.
Only the kalam-era, argument-and-proof sense resembles the modern English “reason.” The earlier sense functioned closer to a faculty of spiritual perception — a light, not a machine. Source: Ahab Bdaiwi, “Different Senses of ʿAql (Reason) in Early Islam,” Leiden Arabic Humanities Blog — written by a university lecturer in Islamic thought and history; an academic blog post rather than a peer-reviewed journal article, noted honestly.