After my wife and I had the privilege of visiting the Louvre in Paris, I called our eleven-year-old granddaughter Addie on the phone. When I mentioned seeing da Vinci’s famous painting Mona Lisa, Addie asked, “Is she smiling?”

Isn’t that the big question surrounding this painting? More than 600 years after Leonardo captured this subject in oil, we still don’t know if the lady was smiling or not. Though enraptured by the painting’s beauty, we are unsure about Mona Lisa’s demeanor.

The “smile” is part of the intrigue of the painting. But how important is this anyway? Is smiling something the Bible mentions?…