Harmony, Harmony, Harmony................

Harmony, what does that mean to you? This past Labor day weekend we were in Nashville, at the National Folk Festival and the experience has caused me to think about the many meanings of harmony.
Music comes to mind first, after all it was a music festival.   Harmony of the musical kind included bands, dancing, singing and instrumental harmonies but truly it was so much more than that.  What does harmony mean to you?