What is the next sentence that a knife will rust if it is not sharpened?

The next sentence is that the knife will rust if it is not ground, but it will stink if the water does not flow, which means that the knife will rust and not be sharp if it is left for a long time. If people don't study, they can't keep up with the times, and it is very difficult to survive. Modern society is a learning society, and no one can survive in the competition without learning. Learning is lifelong, there is no time not to learn, there is nothing not to learn, and there is no place not to learn. And the speed of learning is the key to success. Therefore, after mastering the method of fast learning, it is possible to be invincible. In short, you should have a goal in life. Don't stick to previous experience when carrying out your goals.