My research and practice around change in social systems, like organizations and communities, has been through understanding complexity and emergence. I offer a pattern for understanding and working with uncertainty. In short, all change starts with disruption. (After all, no disruption, no need for change.) A healthy relationship with disruption increases our capacity to work constructively with the uncertainty of disruption. That opens to the door to differentiation. Through experimentation and innovation, we discover differences that make a difference. While not guaranteed, if the need is still relevant, coherent assumptions likely emerge that enable a novel, more complex system to coalesce. See Engaging Emergence: Turning Upheaval into Opportunity.