Carl R. Rogers said this quote
“ I am willing for the participant to commit or not commit himself to the group. If a person wishes to remain psychologically on the sidelines, he has my implicit permission to do so. The group itself may or may not be willing for him to remain in this stance but personally I am willing. One skeptical college administrator said that the main things he had learned was that he could withdraw from personal participation, be comfortable about it, and realize that he would not be coerced. To me, this seemed a valuable learning and one that would make it much more possible for him actually to participate at the next opportunity. Recent reports on his behavior, a full year later, suggest that he gained and changed from his seeming nonparticipation. ”