Missionary John G. Paton was invited to dinner with a wealthy friend. Paton noticed that the servant poured a glass of whiskey for his host. Somewhat embarrassed, the man explained, "I take a little whiskey for my cough on my doctor's prescription."

Paton asked "How long have you been doing this?"

"Eight years," came the reply.

"Is your cough getting any better?" asked Paton.

"No," answered the man.

"Well," said the missionary, "if I had a doctor who prescribed for me for 8 years and it didn't help me, I would quit taking his prescriptions and get a new doctor."