I once heard someone say, "We communicate our values."  Another person put it this way:  "We act out our beliefs."  Craig Groeschel, pastor of LifeChurch.tv, told this story in one of his sermons: 

What you believe determines how you behave ... For example, one time, when my oldest son Sam came running in, throwing up into his hands ... *blechghchgh* and he said, "Daddy, Bookie is eating his poop!"  So I ran past Sam who was throwing up in his hands and ran into the room where there was little Bookie, my second son, with dark stuff all over him.  And I threw up, not in my hands.  It was like, violent, vomiting.  It went well beyond my hands.  It went everywhere.  So Sam's in throw-up, I'm in throw-up, and so we did the only thing we could do, which was call for Mom ... She came busting in, by all the throw-up, and there was Bookie with the dark stuff.  And she just went up to him and wiped off the smudged Oreo cookie which was on his face.  Wasn't poop; it was Oreo cookie.  But we believed it was poop, and so it affected us as if it were poop.

That's probably the best sermon I've ever heard.  And he makes an excellent point.