According to search-discovered classical Islamic scholarship, the concept of 'Change' is defined by a profound dualism. The Quran repeatedly affirms that there is no change (Tabdeel) to the Words, Promises, and fundamental Laws of Allah (Sunnat Allah), as seen in verses 10:64 and 48:23. This establishes divine immutability and reliability. Conversely, the Quran powerfully asserts that the condition of humanity is subject to change, as stated in the pivotal verse 13:11: 'Indeed, Allah will not change the condition of a people until they change what is in themselves.' Ibn Kathir's tafsir clarifies this is a divine principle where human agency—the internal transformation of belief and action—is the catalyst for change in external circumstances. This change can be positive, as in the case of sincere repentance where Allah replaces evil deeds with good (25:70), or negative, such as altering a will unjustly (2:181), which is condemned. Al-Tabari's linguistic analysis of the root ب-د-ل confirms that 'Tabdeel' implies a fundamental substitution, highlighting the gravity of both divine unchangeability and the transformative potential of human choice.