God in Islam
Who Muslims mean by Allah, why oneness is the whole of the creed, and what the ninety-nine names describe.
Muslims call God Allah. The word is not a name for a separate or tribal deity; it is the ordinary Arabic word for the one God, and an Arabic Bible uses it on every page where an English Bible says God. Its grammar carries part of the argument. Allah has no plural and no feminine form, so the language itself refuses the idea of a pantheon or a divine consort. He, Him and His appear in translation for grammatical reasons only, and Muslims do not read gender into them.
The creed is compressed into four Arabic words: la ilaha illa Allah, there is no god but God. Muslims call this tawhid, oneness, and treat it as the axis the whole religion turns on. Saying it with understanding is what makes a person a Muslim. Denying it, or setting anything alongside God as an object of worship, is the one thing the Quran describes as beyond forgiveness for a person who dies holding to it.
Oneness in this tradition means more than counting to one. It has several sides. God exists. He is the only Lord, which is to say the only creator, owner and sustainer of everything, and He did not wind the world up and step away from it; the sources describe creation as depending on Him at every moment for its continuance. He alone has the right to be worshipped, with no saint, angel, prophet or priest standing in between as an intermediary. And He is known through the names and descriptions He gave of Himself, not through what people imagine about Him.
The ninety-nine names
Muhammad, peace be upon him, is reported to have said that God has ninety-nine names, one short of a hundred, and that whoever learns them enters Paradise. Learning here means more than memorising a list. It means understanding what each name describes and calling on God by the name that fits the moment. Ar-Rahman, the Most Merciful. Al-Ghafur, the Endlessly Forgiving. Al-’Adl, the Just. Al-Khaliq, the Creator. Al-Basir, the All-Seeing. Muslims use them in prayer the way you would address someone by the quality you are appealing to.
Alongside the names runs a firm limit. The Quran says of God that there is nothing like Him, and Muslim theology takes that literally: whatever picture comes to mind is by definition not Him. He does not enter creation, does not take human form, does not have a body that can be depicted. This is a large part of why mosques carry patterns and calligraphy instead of images.
Finding Him
Islam does not treat God’s existence as a theorem waiting on proof. The assumption is that every person is born with an innate sense of a creator, called fitrah in Arabic, which upbringing and habit can bury but not delete. From a ship you infer a shipbuilder; from the world you infer its maker. Much of the Quran points at ordinary things, rain, seed, the body, the sky, and asks the reader to look properly.
What follows from all this is practical rather than abstract. Muslim writing spends far less energy proving God exists than on what a person owes Him once they accept that He does: gratitude, honesty, prayer, and the willingness to live by what He asked for.