people are learning and practicing through their lives. From reading words in text book
Education (books) and experience are the main two channels for People to gain their knowledge. Each play different roles for people. In my opinion, knowledge from experience is more important than that from books.
Experience first can prove if the knowledge form books are true or false. Textbooks are very wonderful in teaching people essential principles, how is the world looks like? what is the basic law of change of people and things? We can learn a lot through primary school, secondary school until university. However, people can only understand the really meaning of those form books and justify them if they are right through practices. A few hundred years ago, people learnt from text book that the earth was flat. However scientists found that was wrong through observations and measurement.