Islam is based on monotheism. Tawhid, the oneness of Allah, is an essential belief for all Muslims. Islam teaches that Allah, the one god, has 99 attributes. Although we can understand some of His attributes, His essence cannot be comprehended by a human's limited mental capacity. Allah has created mankind primarily so that they may know their creator through his creations.
Realisation of the supremacy of Allah, although necessary for success in the hereafter, has not been enforced on man - it is a test that is based on the fact that man has been given free will. However, man's free will is limited, although he has the freedom to choose between right and wrong, he cannot change parts of his destiny that Allah has pre-determined. Understanding the nature of Allah is essential as it has a substantial effect on a Muslim's duties to Allah.
The oneness of Allah is the one most important theological principal in Islam. The first of the five pillars, the declaration of faith, which