For this reason alone, psychological and therefore psychoanalytical terms are always inexact and only can be proven correct through indirect means, something which already has been known for decades. I have shown that the idea of making psychoanalysis into a medical science represents a complete misunderstanding of Freud's work. An essential difference between medicine and psychoanalysis is that while the first wants to heal, the second wants to help. Character disturbances are not illnesses in the manner of bodily illness. They are called 'illnesses' for historical rather than scientific reasons.
Neuroses develop from conflicts of the mind and psyche.
Bodily illnesses are created by bacteria, viruses, poison or physical injury. They can be cured even if doing so is against the patient's wishes. It is impossible to do the same with neuroses or character disturbances. When scientists claim that psychoanalysis is not a natural science, they are correct. However, when they claim that psychoanalysis is not anything which can be proven and can be made evident, they are incorrect.