A preacher was making his rounds on a bicycle, when he came upon a little boy trying to sell a lawn mower. "How much do you want for the mower?" asked the preacher.
"I just want enough money to go out and buy me a bicycle." said the little boy.
After a moment of consideration, the preacher asked, "Will you take my bike in trade for it?"
The little boy asked if he could try it out first. He told the preacher he hadn't ridden a bicycle in a long time and wasn't sure he could still ride one.
The preacher told him, "Just keep trying. It'll come back to you."
After riding the bike around a little while, the little boy said, "Mister, you've got yourself a deal."
The preacher took the mower and began to crank it. He pulled on the rope a few times with no response from the mower. The preacher called the little boy over and said, "I can't get this mower to start."
The little boy said, "That's because you have to cuss at it to get it started."
The preacher said, "I can't cuss. It's been so long since I became a Christian that I don't even remember how to cuss."
The little boy looked at him happily and said, "You just keep pulling on that rope. It'll come back to you."