Allah is the Arabic word for God in Islamic theology. It is the central deity in Islam, and Muslims believe that Allah is the one and only God, the creator of the universe, and the ultimate source of guidance and authority in their faith. Allah is considered to be transcendent, all-powerful, and all-knowing, and is often referred to with attributes such as "the Merciful" and "the Compassionate" in Islamic tradition. Islamic worship, prayer, and belief are centered around the concept of Allah.