Interest can be a very good teacher. It guides you to discover things you are interested in and explore the mysteries of some amazing thing. When your teacher asks you to learn something, you are forced to, not active. But if you are interested in something, you will be glad to study it. You will search the Internet to find information or ask someone who knows something about it. You will try your best analyze it and understand it. Doing so always has a good effect on yourself.