Author and speaker Canon J. John tells this story:
A factory employee headed home at the end of a long day, pushing a wheelbarrow. Inside the wheelbarrow was a small box.
At the security gate, the guard stopped him and asked, “What’s in the box?”
The worker replied, “The sawdust from the floor. At the end of the day, it’s swept up and thrown away. I need some, so I put it in a box to take home.”
The guard looked inside the box and, sure enough, it was filled with sawdust.