It is extremely interesting, therefore, to observe the exchange of views both on an emotional and scientific level, the disagreements that lead to a definitive rupture and the end of a friendship and a fruitful scientific collaboration.

We see, especially in the initial period of the correspondence, two brilliant individuals grappling with their mental difficulties and their inner demons, and starting from these, they delve into the depths of unconscious human psychology, as had never been done in the past to this extent and with such scientific understanding and completeness.

Matthias Joasaphat