Taken from Page XV of Royal Road to Card Magic:
Jean Hugard and Frederick Braue wrote:
Many years ago, David Devant, the great English conjurer, was approached by an acquaintance new to sleight-of-hand with cards. "Mr. Devant," said this young man, "I know three hundred tricks with cards. How many do you know?" Devant glanced at the youth quizzically. "I should say," the magician responded drily, "that I know about eight."
Devant was making a point with which all professional magicians are familiar. To perform card tricks entertainingly you must not only know how the tricks are done, but how to do them. There is a vast difference between the two, and if proof were needed, one need only watch the same feat performed by a novice and by an expert card conjurer. The novice knows the mechanics of so many tricks that he cannot do any one feat really well; the professional performs a smaller number of tricks which he knows how to present in such a way as to create the greatest possibly impression upon those who watch.
We cannot emphasize too strongly that knowing the secret of a trick is not the same as knowing how to perform that trick; and that knowing the secret of hundreds of tricks is of little value unless each can be performed smoothly and entertainingly. It is far better to know only a few tricks which can be performed with grace, skill, and effect.
In writing this book, we have attempted to teach you card tricks which may be performed anywhere, at any time, under any circumstances, for any company, and using any pack of cards. you will not need "trick" packs of cards, nor special cards, nor expensive accessories. This is most important, for it means that no matter were you may be, you need only borrow a deck of cards when called upon to entertain; the ability to amuse and interest will be literally at your finger tips.
To ensure that you will be a good card magician, we have introduced you to the mysteries of card magic progressively...