The Devil tells a Consultant, "OK, I can make you richer, more successful and more famous than any Consultant alive. In fact, I can make you the greatest Consultant that ever walked the planet."

"Great" says the Consultant, "What do I have to do in return?"

The Devil smiles, "Well, of course you have to give me your soul," he says, "but you also have to give me the souls of your children, the souls of your children's children and, just for good measure, you have to give me the souls of all your descendants throughout eternity."

"Wait a minute," the Consultant says cautiously, "What's the catch?"