The Depth of Knowledge to Be Gained from Books Is Much Richer and Broader than what Can Be Learned from Direct Experience

Admittedly, some knowledge in books is the systematical expression of our forefathers' direct or indirect experience, whether it is true or not we need to experience it then verify it. Furthermore, both pure ideas or theories in books and one's direct experiences are usually interweaved together and propped each other in the course of study. Only we realize their interconnections and properly choose which to learn in different situations for distinct purposes, can we learn better and accumulate more knowledge in the end.…