Over the centuries, the entrance to Bethlehem’s Church of the Nativity has twice been made smaller. The purpose in the last case was to keep marauders from entering the basilica on horseback. It’s now referred to as the “Door of Humility,” because visitors must bend down to enter.

As we age, bending our knees becomes more and more difficult and painful. In the physical realm, some people courageously undergo knee replacement surgery. To avoid years of increasingly painful joint damage, they endure several weeks of agony.