Allah, ta^ala, said in the Qur’an:
Code:
أَفِي اللّهِ شَكٌّ
Afi-llahi shakk.
Ayah 10 of Surah Ibrahim means: {There is no doubt about the existence of Allah.}
The first obligation on the mukallaf person is to know about Allah, ta^ala. Allah is the Creator of all the existent things and is the One Who manages all the creation. If, with our sound mind, we carefully think about all the creations and ponder about their existence, we must know that they have a Creator Who created them.
The mental proof that Allah exists:
With the sound mind, we know irrefutably that every writing has to have a writer, the act of hitting has to have a hitter, and that a building has to have a builder. Therefore, it follows that this universe with all the creations in it has to have a creator Who is Alive, attributed with Will, Knowledge, and Power, and this is Allah. He is clear of all imperfections. He is the One Who does not resemble any of His creations, and nothing resembles Him. The sound mind does not accept the existence of an action without someone who carried it out.
It is not conceivable for nature to be the Creator, because nature has no will. So, how would nature create? It is also not permissible for something to create itself. Finally, something cannot create something that resembles it.
For example, the child is born small; he does not talk or walk. Then he develops. He starts gradually and slowly to talk and walk. Then he matures and becomes a young man, then middle-aged, then old, after which he dies. Who changed him and transformed him from one state to another? Allah is the One Who created and changed him, and willed for him to die.
Allah knows best.