question #2 Sahih Muslim 523a, Book 5, Hadith 7 : How does the concept of the finality of prophethood relate to the mission of Prophet Muhammad?

I have been given superiority over the other prophets in six respects: I have been given words which are concise but comprehensive in meaning; I have been helped by terror (in the hearts of enemies): spoils have been made lawful to me: the earth has been made for me clean and a place of worship; I have been sent to all mankind and the line of prophets is closed with me.