Salaam (Greetings) leads to Love, Love leads to Faith (Iman) and Iman (Faith) leads to Paradise

Abu Hurayrah (radiyAllaahu anhu) reports that,

The Messenger of Allaah (sallAllaahu alayhi wa sallam) said, "by the One in Whose Hand is my soul, you will not enter Paradise until you believe and you will not believe until you love one another. Should I not direct you to something which, if you do, you will love one another? Give currency to the salaam amongst yourselves."(Saheeh Ibn Majah)