Leaders of today are facing daily uncertainty and sudden market changes. Previous accumulated experience is often of little use to them. They sometimes confront the painful truth that they don’t know how to respond to the situation. Awareness of ignorance can cause confusion that is not easy to accept and tolerate. Possible “defenses” include extremes of overconfidence (“I know what to do in such situations”) or withdrawal into passivity and risk avoidance. Both do not help the organization become more efficient. To increase a leader’s capacity to accept uncertainty, a different approach to learning is needed compared to traditional training. Experiential learning is a possible response. In the mid-20th century, the Tavistock Institute in London organized the first “Group Relations Conference” (GRC) based on the concept of experiential learning. The conference involves no lectures, presentations, or theoretical discussions. Participants go through the experience of a temporary organization where they become aware of how they behave as leaders in various situations and how they relate to authorities and assigned tasks. The automatism of their own behavior in the organization becomes clearer to them. During the conference, they learn from the experience about themselves and the organization. GRC is an incubator for in-depth exploration of modern organizational life. In a safe environment, participants can experiment with different behaviors and observe what happens when, for example, they are in the spotlight or isolated. They can also experiment with their aggressiveness or showing vulnerability in the group. GRC is a very effective way to learn about the impact of unconscious processes on organizational life. Today, GRC conferences are a widespread modality of experiential learning where leaders explore their habitual behaviors in the organization in a group setting. During the conference, they confront situations where they don’t know how to react, realize they are not alone in that, and understand that it’s okay not to know. This later helps them calmly tolerate the uncertainties of the business environment.