Mulla went to visit a wealthy friend. The servant answered the door and said, "The master is not home." The next day, that same wealthy friend needed something and came to Mulla's house. He knocked on the door. From behind the closed door, Mulla yelled, "I'm not home!" The friend laughed, "Stop joking, I can hear your voice!" Mulla replied, "You must be joking! I believed your servant yesterday, but you won't even believe me today?!"