Aqidah is the "Creed" or "Belief System" that a Muslim "ties" (root word *aqada*) to their heart with absolute certainty. It is the foundation of the entire Islamic life. Aqidah focuses on the "Arkan al-Iman" (Pillars of Faith) and the "Asma al-Husna" (Beautiful Names of Allah). Unlike "Fiqh," which deals with "Amal" (actions) and can have "Ikhtilaf" (disagreement), the core of Aqidah is "Qat'i" (definitive). A sound Aqidah protects the believer from "Shirk" (polytheism) and "Nifaq" (hypocrisy), ensuring that the heart is entirely dedicated to the "Ubudiyyah" (servitude) of the One True God, Allah.