This sentence mainly tells everyone that medicine is not as simple as imagined. No matter what kind of doctor, studying medicine is absolutely endless, and it is never too late to learn anything.

2. Stay away from human happiness.

This sentence is mainly to tell you that most people who study medicine are very busy, with strong concentration, devoted to scientific research and work, and have no desire for pleasure.

From then on, the world is like a cloud.

This sentence is mainly about being a doctor. I have seen the changes in the world and human nature, and I have looked down on people's life and death, and I have never been tired of it since.