Imaam Barbahaaree rahimahullaah said:
Know may Allah have mercy upon you! that knowledge is not in merely narrating a great deal and (having many) books. The scholar is the one who follows the Book and the Sunnah, even if his knowledge is limited  and (even if) he only has a few books.
- 1. Knowledge is not in merely narrating a great deal and books – Sharh as-Sunnah | Dawud Burbank (download audio)