There is a public discussion today about which sources, experience and books, to obtain knowledge are more important. Some people argue that experience are more important, for which knowledge gained from it can be directly applied in our life. But, people who advocate books, on the other hand, argue that they are more important. As far as I am concerned, books is more important than experience for gaining knowledge, because they can be obtained more conveniently and the knowledge from them are more systematic.There are a number of reasons for my appreciation books for more important sources. First, books can be obtained from many ways, but experience can be only obtained from the specific people who have it.As a result, knowledge can be obtained from books more conveniently and quickly than that from experience.For example, last year, I have to use a software in my research, but I didn't use it. The situation is that, in my school, there is no one who can use this tool, so if I want to study how to use it from some who have has the ability to use it, I should go to other universities even other cities. It will obviously cost many time. But actually, I found easily several books  about how to use this software in my university library, and then two days later, I was pretty much good at using it. Consequently, books is more important than experience as they can be obtained more conveniently and quickly.Second, the knowledge gained from books is more systematic and so can be applied more pervasive as compared that from experience. As we know, the basic character of books is that they have a clear logic, and the knowledge in them often derive from series of similar problem. However, experience is often related to some specific conditions. So, knowledge from books can usually answer more questions than that from specific experience. For instance, if we want to know what time it is needed for a iron ball falling from a ten meters high tower, the result can be obtained from books and experience. we can use a physical law to calculate the time needed, and we can just ask a person who has recorded the time of such process earlier. But if we change the height from ten to twenty meters, then the physic law can also tell us how much time it is needed, but the person usually cannot.    When people appreciate the huge knowledge brought by books, isn't it necessary that they give some consideration to the aspects that the experience also has some advantages. For example, knowledge from experience usually can be applied directly in our life. If you want to learn how to drive a car, the best way is to hire a experienced driver to teach you, their experience can be used by you directly. But the driving instructions on the book are not so direct to be used in driving. Considering all the factors above, we may safely come to the conclusion that books are more important than experience as sources for obtaining knowledge, although experience can be more directly applied in some conditions.