You don't see them very often now, but when I was a child just about every cattle farmer had an electric fence around their cow pens. It was a life changing moment if you made the mistake of brushing up against the thin aluminum wire while standing on dew covered grass. It would curl the tips of your hair.
The fence was powered by a transformer that had a dial you could adjust from 1 to 10, the higher the number the more power flowing through the line. Sometimes farmers would get a real stubborn bull, he would just walk right through the fence, that is, until you turned it up to 10, then it would curl his upper lip and stop any thought of folly. It took more power to get the attention of the tough ones.
I wonder if someone reading this has already made the spiritual application, it's true, it takes more power to reach the strong willed, stubborn ones, those who have been hardened by willful sin. There is no sin or sinner that God's power cannot transform, but we must turn the dial all the way up to reach this generation. Look how Jesus instructed his disciples in Matthew 17:21, Howbeit this kind goeth not out but by prayer and fasting. Some cases are harder than others, and when you run across one you'll have to pray down the power.
Pastor Ken Smith