There is a story that when Moses went in front of Pharaoh to ask that his people be let free, he showed them a piece of magic. Pharaoh’s magicians replied that they had many tricks like that and Moses should show his tricks in some more provincial place where people were easily amazed. Moses replied that if one has superior fish one should come to a crowded market to sell it, because there the customers would see its true worth.
In The Apple Tree 