[The evildoer's] behavior has been threatening to those whose own morality is insecure; and as long as he is seen as having exemplified the tempting … - George Kelly

Johann Herbart’s work on education and particularly mathematical psychology influenced me. I think mathematics is the pure instance of construct functioning—the model of human behaviour.

We attempt to use the phenomenologist's approach to arrive at personalized constructs which have a wide range of meaning for the given individual; then we attempt to piece together this high-level type of data with what we know about other persons.

From the standpoint of the psychology of personal constructs we may define a disorder as any personal construction which is used repeatedly in spite of consistent invalidation.