In Maté’s definition, a state in which one engages compulsively in an activity or in the consumption of a substance that brings one temporary satisfaction or relief but has long-term negative effects. In this definition, addiction is associated with far more activities and is far more widespread than commonly acknowledged.

According to Maté, attachment is one of the most essential human needs: to be connected to other people. In childhood, the primary attachment relationship is with the parents.

The second fundamental human need, alongside attachment. Authenticity in The Myth of Normal refers to the need and drive to give full expression to one’s feelings.