'...evaluation by others is not a guide for me.  The judgments of others, while they are to be listened to, and taken into account for what they are, can never be a guide for me.  This has been a hard thing to learn......I have come to feel that only one person (at least in my lifetime, and perhaps ever) can know whether what I am doing is honest, thorough, open and sound, or false and defensive and unsound, and I am that person.  I am happy to get all sorts of evidence regarding what I am doing and criticism (both friendly and hostile) and praise (both sincere and fawning) are a part of such evidence.  But to weigh this evidence and to determine its meaning and usefulness is a task I cannot relinquish to anyone else.'  (Carl Rogers 'On Becoming a Person' 1967 edition p. 23)