He [صلى الله عليه وسلم‎] is a Rehmat-ul-lil-Alameen (mercy for all the worlds). He [صلى الله عليه وسلم‎] is the final Prophet and Seal of Prophet hood.
Say (O Muhammad to mankind):
“If you (really) love Allah, then follow me (i.e. Muhammad),
Allah will love you and forgive you your sins. And Allah is Oft-Forgiving, Most Merciful.”
Holy Quran 3:31