This thesis has analyzed Paul Theodoor Hugenholtz’s (1903-1987) dissertation On time and time-forms from 1938 and provides an interpretation of the core argument of the author. On time and time-forms is shown to present a new theory concerning time, distinguishing several different ‘forms’ of time. These time-forms were claimed to structure human experience, and to cause psychopathological syndromes if they are disturbed. Several developments in philosophy and psychiatry at the beginning of the twentieth century were at the basis of this new type of psychiatric thinking about time. Karl Jaspers (1883-1969) advocated a more prominent role of phenomenology in psychiatry. His phenomenological psychiatry gave rise to a psychiatric tradition th...