Jaspers earned his medical doctorate from the University of Heidelberg medical school in 1908 and began work at a psychiatric hospital in Heidelberg under Franz Nissl, successor of Emil Kraepelin and Karl Bonhoeffer, and Karl Wilmans. Jaspers became dissatisfied with the way the medical community of the time approached the study of mental illness and gave himself the task of improving the psychiatric approach. In 1913 Jaspers habilitated at the philosophical faculty of the Heidelberg University and gained there in 1914 a post as a psychology teacher. The post later became a permanent philosophical one, and Jaspers never returned to clinical practice. During this time Jaspers was a close friend of the Weber family (Max Weber also having held a professorship at Heidelberg).