The relationship between learner and teacher is unequal. The teacher has authority because they are the holder of knowledge. As Audrey Watters has said, the learner has to admit to their own vulnerability in order to learn. They have to accept the superior knowledge of the teacher in order to benefit from the learning transaction.
But is it only the learner who should be in a position of vulnerability? For the teacher/trainer/facilitator to be a co-learner, to be open to exploring new ideas and generating new knowledge, surely they need to be vulnerable too? And if so, how can a trainer/facilitator balance their position of authority with this openness and vulnerability? Jonathan Worth and I explored this idea.