· Allah, the Creator of the whole universe is One.
· Humanity is One, as all the human beings are created equal. 
· The Religion is One, as all the prophets taught the same God-given Religion.

There is an underlying unity in the diverse phenomena of the universe, which is borne out by the uniformity of laws that govern the working of every part of the universe. We do not see any clash in the so-called laws of nature, which are also called the laws of science, as scientists have discovered them. This is a fact that very clearly points to the Unity of the Lawgiver, Allah.

Human beings, whether black, white, brown, Asian, Australian or European show the same qualities that characterize the species called homosapiens (man the wise). This means that differences of nationality, race or language are accidental and have no innate value. As Dryden, the famous English essayist wrote, "mankind is ever the same." This unity of mankind is linked to the Unity of the Creator, from the Islamic point of view. 

From the very beginning of mankind, God has revealed through His prophets answers to man's eternal questions. To different peoples of the world who lived in different periods of history, God sent His Guidance through His prophets. And it was thus that religion came into existence. Though taught by different prophets, the essential religion of God had to be the same since the Source of this guidance was the same and the addressees were basically also the same. Hence the Unity of religion.

Since the life of a Muslim is to be completely God-directed, he/she has to accept the following ideas about God: 

Allah is the One God, Who has no partner; there is nothing and no one like Him.

He is the First, the Last, and the Everlasting; He is All-Powerful, Eternally Just, the Supreme, the Sovereign.

He is the All-Knowing, and All-Merciful, and He is the only One capable of granting life to anything.

For the above reasons, accept His Guidance alone, worship Him alone and seek His help alone.

Allah says in the Holy Qur'an: 

"He knows what is in land and sea; not a leaf falls, but He knows it. Not a grain in the earth's shadow, not a thing fresh or withered, but it is in a Book Manifest. It is He who recalls you by night, and He knows what you work by day" (An'am, 6: 59-60). 

Also:

"There is no God but He, the Living, the Everlasting. Slumber seizes Him not, neither sleep; to Him belongs all that is in the heavens and the earth. Who is there that shall intercede with Him save by His leave? He knows what lies before them and what is after them, and they comprehend not anything of His knowledge save such as He wills. His throne comprises the heavens and earth; the preserving of them oppresses Him not; He is the All-High, the All-Glorious" (Baqara, 2: 255) 

So what should be our duty to God?

Allah says:

"O you men, serve your Lord Who created you, and those that were before you; so that you will be God-fearing; Who assigned to you the earth for a couch, and heaven for an edifice, and sent down out of heaven water, wherewith He brought forth fruits for your provision; so set not up rivals to God wittingly" (al-Baqara, 2: 21-22). 

Thus, a Muslim has to surrender his/ her self to Allah, the Only Creator and Preserver - Who alone deserves our whole-hearted worship and unconditional obedience.