All of our activities have purposes. Allah, the Beneficient, also does not do anything without any purpose. He has sent innumerable holy prophets (nobi-Rasuls) to this earth , and there is a noble purpose or mission behind this. The purpose id to this mankind towards the right path. All the prophets beginning from Hazrat Adam (A) to the last prophet Hazrat Muhammad (Sm) had the same mission.,i.e.to teach mankind, to gude them towards the right path.