Jesus was a master teacher. In Mark it says, “They were amazed at His teaching; for He was teaching them as one having authority, and not as the scribes” Mark 1:22 (NASU).
When we teach someone there is a risk that we will offend them. If that happens then the people we are teaching may become defensive. If they become defensive they become less teachable. The subject matter becomes less important to them because they are now defending their territory. They quit listening and start preparing what their comeback will be.
The greatest teachers are masterful learners. You can never teach what you don’t know.