I was looking for a quote I wanted to include in a presentation when I happened on another one that reminded me of an aspect of learning we don’t think about as regularly as we should. “Probably the most violent and aggressive act that any person can do to other persons is to invade their minds with ideas and twists of meaning which disturb the comforting security of things known and faith kept. Yet this is what I, as a teacher, am required to do." – R. W. Packer, “Breaking the Sound Barrier: A Dramatic Presentation” in Teaching in the Universities: No One Way, McGill-Queens University Press, 1974.