The linear process of solving problems is to first find a solution, and then execute. In situations of sufficient complexity, like many of our challenges today, this fails. We cannot know the answer, yet we must begin. — In order to make peace with complexity, we must surrender certainty. In practice, complexity means constant change, a continuous flow of inputs that can rarely be predicted. In these contexts, solutions from yesterday may not work today. There is no luxury of “knowing”, there is no certainty, except for change.