One quarter while teaching an adult Sunday school class, I decided, It’s time to be up-to-date and innovative. I need to try something new for our class.
We were studying one of the Old Testament books.
I found an overhead projector and tried to teach myself how to use it.
Then I wrote an outline on an overhead transparency to display for the class.
When Sunday morning came, I had the projector all set up.
At the right moment in the lesson, I flipped on the overhead.
The beautiful outline flashed on the wall for all to see.
To emphasize a significant spiritual truth in the passage, I grabbed one of the special markers, walked over and started writing in bold letters on the outline.
The class burst out laughing.
Why are they laughing? I thought to myself. This is the crucial point!
Then it hit me.
I was writing on the wall.
It seems I’d been a little unclear on the overhead concept.
The class wouldn’t let me forget it.
In fact, for many weeks they wouldn’t allow me to remove my brilliant insight from the wall.
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