He looked for ways in which new ideas could come into being via spontaneous insight rather than conflict. - Tom Butler-Bowdon

The source of extraversion or introversion was in the varying levels of excitability of the brain; the driver

Neo-Freudian Karen Horney believed that childhood experiences resulted in our creation of a self that “moved toward people” or “moved away from people.” These tendencies were a sort of mask that could develop into neurosis if we were not willing to move beyond them. Underneath was what she called a “wholehearted,” or real, person.

When a natural instinct surfaces, the ego wants to have it satisfied, but the superego does not allow that. The ego submits to the “higher” superego, but is left with the problem. It begins a struggle with the impulse and, to reduce the pain of not satisfying it, engineers a defense that allows itself to make sense of its decision to submit.