Fully accepting the oneness of God is to accept that He is distinct from everything else. It would not suit God’s majesty and glory to associate the limited attributes of His creation to Him because He is not restricted in any way, while His creation is.
He is the First with no beginning and the Last with no end. Everything in the universe was created by His will. He is not confined by space or time and He is the only One who is in control and provides for His creation.
Surat Al-Ĥashr (The Exile) – سورة الحشر
هُوَ اللَّهُ الَّذِي لَا إِلَٰهَ إِلَّا هُوَ ۖ عَالِمُ الْغَيْبِ وَالشَّهَادَةِ ۖ هُوَ الرَّحْمَٰنُ الرَّحِيمُ
هُوَ اللَّهُ الَّذِي لَا إِلَٰهَ إِلَّا هُوَ الْمَلِكُ الْقُدُّوسُ السَّلَامُ الْمُؤْمِنُ الْمُهَيْمِنُ الْعَزِيزُ الْجَبَّارُ الْمُتَكَبِّرُ ۚ سُبْحَانَ اللَّهِ عَمَّا يُشْرِكُونَ
هُوَ اللَّهُ الْخَالِقُ الْبَارِئُ الْمُصَوِّرُ ۖ لَهُ الْأَسْمَاءُ الْحُسْنَىٰ ۚ يُسَبِّحُ لَهُ مَا فِي السَّمَاوَاتِ وَالْأَرْضِ ۖ وَهُوَ الْعَزِيزُ الْحَكِيمُ
“He is God: there is no god other than Him. It is He who knows what is hidden as well as what is in the open, He is the Lord of Mercy, the Giver of Mercy. He is God: there is no god other than Him, the Controller, the Holy One, Source of Peace, Granter of Security, Guardian over all, the Almighty, the Compeller, the Truly Great; God is far above anything they consider to be His partner. He is God: the Creator, the Originator, the Shaper. The best names belong to Him. Everything in the heavens and earth glorifies Him: He is the Almighty, the Wise.” | QS 59:22-24.