According to Cambridge advance dictionary (2006) knowledge is understanding of or information about a subject which a person gets by experience or study, and which is either in a person's mind or known by people generally. As children, they need book to guide them to know everything. Even book has a lot of information and knowledge; experience will be the most helpful and easy to remember for children learner. For instance: they can start to learn about the thing which is a good or not. It is written in textbook which read by the children at school, but those only the theory. Otherwise, they will apply it in their daily life. In the playground, children will learn how to get relationship with other friends. They will learn it from their experience not from the textbook that they learnt at school.
As student of university, it is time for them to know about their future life even career or family future. In fact, in college, the lecturer only gives the particular lesson from the book which is related to the material. It was not enough for improving their skill. Indeed, there are a lot of books contains of improving our skill of life, but it only theory. The experience is the most important thing to applicant the theory from the book. In class, student learns about what success is, and they will know how to feel the failure when they see other students are succeeded. This situation is stated in some books, but it applies in the real life. It will be their