Bound Hand and Foot
When I was speaking to five thousand children in Glasgow some years ago, I took a spool of thread and said to one of the largest boys:
"Do you believe I can bind you with that thread?"
He laughed at the idea. I wound the thread around him a few times, and he broke it with a single jerk.
Then I wound the thread around and around, and by and by I said:
"Now get free if you can."
He couldn't move head or foot. If you are slave to some vile habit, you must either slay that habit, or it will slay you.