The big questions, the philosophical implications and the personal motivations.
What actually is yunity and why do people feel drawn to it? What do they see in it? What do they want to achieve? What are the various concrete ideas subsumed by our pretty vague vision and mission?
Most significant progress on a group level was reached in Harzgerode so far, but maybe the most important insight we had there was, that this process will never be finished, and that these questions will always need to be answered anew.