From People of the Lie by Scott Peck.
Attitudes have a kind of inertia. Once set in motion, they will keep going, even in the face of the evidence. To change an attitude requires a considerable amount of work and suffering. The process must begin either in an effortfully maintained posture of constant self-doubt and criticism or else in a painful acknowledgement that what we thought was right all along may not be right after all. Then it proceeds into a state of confusion. This state is quite uncomfortable; we no longer seem to know what is right or wrong or which way to go. But it is a state of openness and therefore of learning and growing. It is only from the quicksand of confusion that we are able to leap to the new and better vision.