include the action of controlling and therefore one could be al-Malik but not al-Maalik. Allah is described with both al-Malik and al-Maalik– and thus the meaning becomes more profound with regards to Allah.
We thus say that Allah is Alone in His Dominion like He is Alone in His (Act of) Creation. Similarly, He is Alone in controlling all the affairs even the disbelievers affirmed this. If they are asked who runs the affairs of the universe, they will say, 'Allah Alone runs the affairs.'
Shaikh Salih al-Fawzan writes in Mujmal Aqeedah as-Salaf,
"...even Iblees, who is the head of Kufr said, "O my Lord! Because you misled me..." [Soorah al-Hijr (15): 39] and "By Your Might, then I will surely mislead them all." [Soorah as-Saad (38): 82] So he confessed the Lordship of Allah and took an oath by His Might. Similarly, all the disbelievers confessed the Lordship of Allah like Abu Jahl, Abu Lahab and other heads of Kufr.
Allah says, "If you ask them who created them, they will surely say, "Allah" [Soorah Zukhruf (43): 87] "Say, 'In Whose Hands is the sovereignty of everything (i.e. treasures of each and everything)? He protects (all) while against Whom there is no protector, if you know." They will say, "(All that belongs) to Allah." [Soorah al-Mu'minoon (23): 88-89]
“Say, "Who provides for you from the sky and from the earth? Or who owns hearing and sight? Who brings out the living from the dead and brings out the dead from the living? Who disposes the affairs?" They will say, "Allah." Say, "Will you not then be afraid of Allah's punishment (for setting up rivals in worship with Allah)?” So they confessed all this.
During times of hardship they would solely invoke Allah because they knew that Allah Alone can take them out of hardships, and their false god and idols did not posses the power to rescue them from deadly situations. Allah says, "When harm touches you upon the sea, those that you call upon besides Him vanish from you except Him (Allah Alone). But when He brings you safely to land, you turn away (from Him). Man is ever ungrateful." [Soorah al-Isra (17): 67]
He, who believes only in this category of Tawheed (i.e., Rububiyah) does not enter Islam and will not be saved from the Fire. The disbelievers for instance confessed the Oneness of Allah's Lordship but their acceptance did not enter them into Islam. Allah called them disbelievers (Mushrikeen) and ruled that they will burn in Fire forever despite their belief in the Lordship of Allah.
With this becomes manifest the mistake of those writers who follow the way of the philosophers – when they explain Tawheed to mean affirming the Existence of Allah and affirming that Allah is the Sustainer, etc.
We say to them that this is not the Aqeedah with which Allah sent the Messengers. The Kuffar, the Mushrikeen and even Iblees affirmed the Lordship of Allah. Everybody affirms and confesses this category of Tawheed. The Messengers were not sent to ask people to affirm that Allah is the Creator, the Sustainer, the One Who gives life and causes death because this is not enough and does not save one from the punishment." [end quote from Mujmal]
"He (Allah) arranges (every) affair from the heavens to the earth." [Soorah as-Sajdah (32): 5]
A Bedouin was asked, "By what do you know your Lord?" He replied, "Through revoking of one's intentions and dismissing one's interest."
Sometimes, man firmly resolves to do something but a moment later he finds himself revoking his intentions. Perhaps something interests man and he works towards it but then he dismisses it without a reason. This proves that there is someone over you who governs the affairs – and He is Allah.
The Message of all the Messengers was establishment of Tawheed al-Uluhiyyah as has been mentioned before and will be further exaplained, see. pg. 35