I have noticed many things while I have worked to convey my knowledge to people.
The biggest thing I've noticed recently is that words are only auxiliary tools for assistance. That means words are not the main tool for conveying knowledge. They cannot convey understanding by themselves.
The only thing that can convey knowledge is re-experience. To achieve re-experience, people must watch professional actions and imitate them. If there are some gaps, they should adjust with some advice. If they can imitate the action perfectly, there is no need for words.
In addition, people who tend to focus on words in advice cannot understand the knowledge deeply. People should not believe words from others strongly.