A preference for extraversion (seeing life in terms of the external world) or introversion (greater interest in the inner world of ideas) is independ… - Tom Butler-Bowdon

Anna Freud took up where her father left off in focusing on the psychology of the ego, noting that humans do just about anything to avoid pain and preserve a sense of self, and this compulsion often results in the creation of psychological defenses. Neo-Freudian

The remarkable writings of Oliver Sacks, for instance, show that the brain continually works to create and maintain the feeling of an “I” that is in control, even if there is in fact no part of the brain that can be identified as the locus of “self feeling.

This work led cognitive therapists such as Aaron Beck, David D. Burns, and Albert Ellis to build treatment around the idea that our thoughts shape our emotions, not the other way around.