Every single soul knows that he is existing and that his existence is dependent upon a Creator he knows for sure that he cannot create himself. Therefore it is his duty to know his master, the Creator. Man is a unique creature. God gave man the ability to govern over all other creatures in this world. He is endowed with the faculty of reason which sets him apart from all other animals.
Man is born pure and sinless and is given the choice to do righteous deeds or indulge in sins.
The Creator, out of His abundant Love and Mercy for mankind has not left us in darkness to discover the right path by trial and error alone. Coupled with our intellectual capability to reason, our Creator bestowed upon us Divine Guidance that outlines the criterion for truth, knowledge, as well as the reality of our existence in this world and the Hereafter. From the beginning of mankind, our Creator sent Prophets to convey His revelation and to invite human beings to the path of true peace and obedience to the One True God. This is Islam. This message is conveyed towards successive generations of man through the different prophets, all inviting mankind to the same path.