The foundation of the Islamic faith is the belief in absolute Monotheism (the Oneness of God).
This means to believe that there is only ONE Creator and Sustainer of everything in the Universe and that nothing is divine or worthy of being worshipped except for Him. Truly, believing in the Oneness of God means much more than simply believing that there is “One God” - as opposed to two, three or four.
There are a number of religions that claim belief in “One God” and believe that ultimately there is only one Creator and Sustainer of the Universe, but true monotheism is to believe that only the One True Deity is to be worshipped in accordance to the revelation He sent to His Messenger. Islam also rejects the use of all intermediaries between God and Man and insists that people approach God directly and reserve all worship for Him alone. Muslims believe that Almighty God is Compassionate, Loving and Merciful.
A common misconception is a claim that God cannot forgive His creatures directly. By overemphasizing the burden and penalty of sin, as well as claiming that God cannot forgive humans directly, people often despair of the Mercy of God. Once they become convinced that they cannot approach God directly, they turn to false gods for help, such as heroes, political leaders, saviours, saints, and angels. We often find that the people who worship, pray to, or seek intercession from these false deities, do not consider them to be a ‘god’.
They claim belief in One Supreme God but claim that they pray to and worship others beside God only to get closer to Him. In Islam, there is a clear distinction between the Creator and the created. There is no ambiguity or mystery in issues of divinity: anything that is created does not deserve to be worshipped; only Allah, the Creator, is worthy of being worshipped. Some religions believe that God has become part of His creation, and this has led people to believe that they can worship something created in order to reach their Creator.
Muslims believe that even though God is Unique and Exalted beyond speculative comprehension, He definitely has no partners, associates, peers, antagonists or offspring. According to Muslim belief, Allah “neither begets nor was He begotten” - neither literally, allegorically, metaphorically, physically or metaphysically. He is Absolutely Unique and Eternal. He is in control of everything and is perfectly capable of bestowing His infinite Mercy and Forgiveness to whomever He chooses. That is why Allah is also called the All-Powerful and Most-Merciful. Allah has created the Universe for man, and as such wants the best for all human beings.
Muslims view everything in the universe as a sign of the Benevolence of Almighty God. Also, the belief in the Oneness of Allah is not merely a metaphysical concept. It is a dynamic belief that affects one's view of humanity, society and all aspects of practical life. As a logical corollary to the Islamic belief in the Oneness of Allah is its belief in the oneness of mankind and humanity.