David Bohm was a renowned theoretical physicist during the 20th century that made significant contributions in quantum theory, neuropsychology, and the philosophy of mind. His work has always been the place where I've started when thinking about organizational transformation, dialogue, and the nature of creativity.
This is a key quote on removing barriers and listening:
Do you listen freely? If so, how do you remove any mental blocks that may surface when interacting with people? Real progress can be made when the members of a community can eliminate any barriers for entry or interaction.
In these situations, I start paying close attention to what people are doing. Their actions will speak louder than their words and will be a good indication as to whether or not they are open to receiving others.