Nasrudin's vinegar principle

Friend: "Nasrudin, I heard that you have a barrel of thirty year old vinegar. Is it true?"

Nasrudin: "Yes."

Friend: "Can I have some?"

Nasrudin: "No."

Friend: "Why not?"

Nasrudin: "Well, it's just the principal of the matter."

Friend: "What do you mean? What principle?"

Nasrudin: "The principle that if I had given some vinegar to everyone who asked me for some, I would not have any thirty year old vinegar."

    Compiled from the internet