This essay has three aims. We wish to emphasize that (1) one of the main theses of Jaspers' General Psychopathology is that our knowledge is limited to particular points of view within which alone evidence can be interpreted and assessed; (2) this early position of Jaspers (already present in the 1913 edition) has found indirect support recently in a carefully reasoned book by the prestigious philosopher of natural science, Ronald N. Giere, entitled Scientific Perspectivism (2006); and (3) Jaspers' conviction regarding the perspectivalism of knowledge remained powerfully influential throughout all his thought, even in his later philosophy.