There is a kind of artificial learning, not a natural learning, which may be called time-saving. Someone says, "Now people have learned in their lives and they have discovered things for us and written about them in books, and I must learn that by reading the book." But he does not know that he has not learned what that person who has written the book has learned. For instance, someone who has read the books of Luther Burbank, if he has read fifty books on horticulture, has not learned what Luther Burbank had learned. For he had made experiments for himself; he had been in the garden; his joy was such that he could not explain. No doubt another person will benefit by what he has given, but another person cannot enjoy what he has enjoyed, unless he pursues the same course.