My fear as a father is not being able to answer these well-founded questions completely.

Once, I saw a little girl with her father looking at a sculpture of a bull. She asked what animal it was, and her father replied, “It’s a bull.” She then asked, “Isn’t it an ox?” He reaffirmed, “No, it’s a bull.” Curious, she pressed on, “What’s the difference?” He didn’t know the answer—and, to be honest, neither did I.