" The individual becomes more openly aware of his own feelings and attitudes as they exist in him at an organic level, in the way I tried to describe. He also becomes more aware of reality as it exists outside of himself, instead of perceiving it in preconceived categories. He sees that not all trees are green, not all men are stern fathers, not all women are rejecting, not all failure experiences prove that he is no good, and the like. He is able to take in the evidence in a new situation, as it is, rather than distorting it to fit a pattern which he already holds. As you might expect, this increasing ability to be open to experience makes him far more realistic in dealing with new people, new situations, new problems. It means that his beliefs are not rigid, that he can tolerate ambiguity. He can receive much conflicting evidence without forcing closure upon the situation. This openness of awareness to what exists at this moment in oneself and in the situation is, I believe, an important element in the description of the person who emerges from therapy. "

― Carl R. Rogers , On Becoming a Person: A Therapist's View of Psychotherapy