Jesus turned, and saw them following, and said to them, "What are you looking for?" They said to him, "Rabbi" (which is to say, being interpreted, Teacher), "where are you staying?"

 In the Old Testament a change of name often denoted a new relationship with God. For instance, Jacob became Israel ( Genesis 32:28), and Abram became Abraham ( Genesis 17:5) when they entered into a new relationship with God. When a man enters into a new relationship with God, it is as if life began all over again and he became a new man, so that he needs a new name. 