When I was in high school, my Dad's cousin came to visit.  My parents are not Christians, but my Dad's cousin is a music pastor at a church.  We had never met before, but talked for hours.  Afterwards, my Mom asked what in the world a single teenage girl had in common with a married, older man.  I told her, we were both Christians.  She didn't understand, but it was true.  We related because we were both part of the body of Christ.  

I haven't seen him face-to-face since, but we still keep in touch now and again.  Being part of the body of Christ can make you close to someone you would never otherwise be close to. 

 I've been experiencing this quite a bit. ❤️