Adlerian psychology is not a ‘psychology of possession’, but a ‘psychology of use’. YOUTH: So, it’s that statement: ‘It’s not what one is born with, but what use one makes of that equipment.’ PHILOSOPHER: That’s right. Thank you for remembering it. Freudian aetiology is a psychology of possession, and eventually arrives at determinism. Adlerian psychology, on the other hand, is a psychology of use, and it is you who decides it.