We actually haven’t realised the mercy of Allah that He has bestowed to the nation of Prophet Mohammad (صلى الله عليه وسلم). We have been ungrateful to Allah and have disappointed our prophet with our actions, by the way of life that we have adopted. We have exchanged the real diamond i.e. our iman (belief) with a fake one and we have become arrogant in our actions. We cherish of having the fake one in our arrogance and have considered it as the actual one in our ignorance!
Please note here nation stands for all mankind who were at the time of prophethood of our beloved prophet, and who came after and who are yet to come; all are from his nation!
And that is why the message what the prophet (صلى الله عليه وسلم) got is for entire mankind today. Those who believe it and accept it, will only benefit themselves and those who disbelieve & deny it, will only harm themselves.
May Allah make us among those who are grateful to Allah & help us seek the truth, believe in it and walk on the path to implement it!