In Jaspers' philosophy as philosophical faith, knowledge has a noteworthy feature that inward action of subject is reflected in it. So, his philosophy supplies ethics, whose knowledge presupposes an inward action of the ethical subject, with justification as a unique field of learning. Furthermore, Jaspers' periechontology (ontology of encompassing) as the framework of infinitely manifold heterogeneous belief offers us the methodological foundation for the construction of a comprehensive ethics, which is a systematic unification of many heterogeneous ethics. Jaspers' philosophy accomplished by the correlation of philosophical faith and encompassing-thought has tremendous significance for the philosophical ethics.