According to search-discovered classical Islamic scholarship, the concept of Free Choice (Al-Ikhtiyar) is a cornerstone of Islamic theology, affirming that humans possess the God-given agency to choose between belief and disbelief, and obedience and sin, for which they are morally accountable. The Tafsir of Ibn Kathir on Quran 6:148-150 explains that these verses are a direct refutation of the fatalistic argument used by polytheists who tried to blame their wrongdoing on Allah's will. This establishes the Quranic principle that while Allah's Will (Mashi'ah) is all-encompassing, it does not negate human responsibility. The linguistic analysis of 'Ikhtiyar' from the root 'khayr' (good) signifies that true freedom is the choice for what is good. The mainstream Sunni schools, particularly the Ash'aris, resolved the theological paradox through the concept of 'kasb' (acquisition), where Allah is the creator of all actions, but humans acquire them through their choice, thus becoming responsible. This balanced approach upholds both Allah's absolute sovereignty and the justice of human accountability, making free choice the basis of the divine test in this life.