If you want to combine the knowledge in books with your life, you must apply what you have learned. For example, if you learn a math problem, you can make some assumptions when you buy food and apply math theory to it.

However, if you are learning a language and nothing similar happens in your life, you can write a review or diary to record it. If conditions permit, you can also write a novel to express what you want to express.

Of course, if you study physical education, you must practice. For example, if you learn a set of sports theories and tell you how to run, you must try to run and see if you have any achievements. In this process, you must be skeptical, incomplete and untrustworthy. Only in this way can we reduce mistakes and avoid injuries.

Some things are one thing in theory, another in practice, and some things may not be suitable for you. You can only use them freely in your real career.

There are some things that you have to choose. Give up those things that seem useful but useless to you, because your energy and time are limited and you can't cover everything.

If you weigh it, you have to test it through practice. We can't rely entirely on subjective assumptions. Only when we have enough experience and foundation can we deny one thing from the beginning. Even so, there is still the possibility of making mistakes.