Sacred vs Secular

If you are near my age, you may remember the television show, "Little House on the Prairie." Uh oh. Can you hear the song in your heard? It's going through mine right now.

Anyway, remember the one room school house? It also served as the church on Sundays. It was a community building -- sacred some days and secular on others. In fact, I imagine no one would have ever classified one or the other.

I just read about a church in Maine (I think) that is old enough that at one time it was the only building in town large enough to house community events. Church on Sunday...maybe Town Meeting on Monday evening. The lines blur.

Why is it that we insist on classifying certain items as sacred or secular? Does God label them? Why do we?