Class

The professors that teach our classes have remarkable backgrounds-
Some head institutes, some lead trials across Europe, a few have written respected text books-
and all of them are very well known in their fields.
In class however, most of the time, they're entirely approachable, encourage you to ask questions, are happy to discuss obscure topics at length, and have a great sense of humor.
I think it's great that they admit when they have no idea about a topic-
You're also made to feel that it's okay to not grasp a particular concept, as well as repeatedly voice your doubts until you understand it.