(… اللَّهُ ) (Allah …): Absolutely exists and all people know Him innately, and the proof to that is what the Almighty says:

  وَإِذْ أَخَذَ رَبُّكَ مِن بَنِي آدَمَ مِن ظُهُورِهِمْ ذُرِّيَّتَهُمْ وَأَشْهَدَهُمْ عَلَىٰ أَنفُسِهِمْ أَلَسْتُ بِرَبِّكُمْ ۖ قَالُوا بَلَىٰ ۛ شَهِدْنَا ۛ أَن تَقُولُوا يَوْمَ الْقِيَامَةِ إِنَّا كُنَّا عَنْ هَٰذَا غَافِلِينَ

(And [mention] when your Lord took from the children of Adam – from their loins – their descendants and made them testify of themselves, [saying to them], “Am I not your Lord?” They said, “Yes, we have testified.” [This] – lest you should say on the day of Resurrection, “Indeed, we were of this unaware.”.) (Al-A’raaf: 173)

So, it’s innate for all humans to know Allah, but such disposition may deviate. That’s why Allah (swt) sends messengers and prophets in order to bring people back to the faith of ‘there’s no God but Allah.’

(… اللَّهُ لَا إِلَٰهَ إِلَّا هُوَ ) (Allah – there is no deity except Him …): Prophet Muhammad (saws) says:

“the best of what I and the prophets before me have said on the eve of the Day of Arafa, is ‘There is no god but Allah, alone, without partner[1].”

As Allah (swt) says that there is no God but Him and tells us that He has created the skies, earth, humans, non-humans, stones and plants, … etc., there is no objection to that which proves the correctness of such saying. Had there been another God, it would have claimed that it had been the god who’d created the skies and earth as such. Yet, Allah is the only God as long as there is no one to object to that, and there will never ever be. For example, and Allah has the utmost example, suppose a group of people meeting somewhere. Then, when they leave the place to their homes, the owner of the place of the meeting finds a wallet with money in there left in the place. After that a man who has been present in the meeting claims that the wallet and the money are his. They will be his as long as no one claims otherwise. Thus, things belong to whoever claims them and supports his claim with proof and evidence. Likewise, whatever is mentioned in the Holy Quran is dependent on proof, evidence and, above all, logic.

(… الْحَيُّ …) (…the Ever-Living …): Allah (swt) is Ever-Living. Besides all the aspect of life exist on earth and in the skies. Yet, the ‘Ever-Living’ is an attribute of the Almighty that means that the Almighty has been in existence before time and before everything else and never ceases to exist:

 {كلُّ شَيْءٍ هَالِكٌ إِلَّا وَجْهَهُ ۚ}

(Everything will be destroyed except His Face.) (Al- Qasas: 88)

(… الْقَيُّومُ …) (…the Sustainer of existence…): He is the Sustainer who’s in charge of all the affairs of His creatures. So, be assured, He will never forget you:

‘Never overthink a matter           Overthinkers are immortals

Leave it onto Us                          We care for you like no other

Do your part and rely on the Almighty who takes care of all the affairs of His creatures. Our clerics say: ‘never be worried of what people are planning for you for the maximum they can is to carry out what Allah has willed for you.’ This is because Allah is the Ever-Living and the Sustainer of existence.

[1] Hadith no. 12108, P. 73, Vol. 5, Knaz-ul-Ummal