The early Heidelberg school of psychiatry, Karl Jaspers in particular, had
at its centre the question of how to integrate the concept of understanding
human motivations, intentions, and psychopathological symptoms into the co
rpus of scientific psychiatric knowledge. In addition to the theories of Wi
lhelm Dilthey and Edmund Husserl, the sociological investigations of Max We
ber were highly influential for the development of the phenomenological sch
ool of psychiatry. It is often overlooked, however, that the thoughts of Ma
x Weber contain not only some of the most important roots of Jaspersian psy
chopathology but also important early criticisms. This is relevant, in part
icular, for the 'Jaspers theorema' of the non-understandability of the psyc
hoses.