This treatise is purposed to examine spiritual exercises and principles of philosophical healing which is extracted from the principal arguments of epistemology by analyzing stoic texts in Hellenistic period. First, it has to research how to be explained phantasia in Greek philosophy, and received it`s variation in stoic epistemology. Second, it is analyzed the important role and function of kataleptike phantasia in stoicism, and inquired how to be established it`s status confronting with critics of ancient pyrrhonism. There is a difference between stoicism and pyrrhonism on kataleptike phantasia. Pyrrhonist sceptics is abolished it`s role in epistemology. But stoicism make to work phantasia by introducing ``assesment``(synkatathesis) relative to reasonal judgement. Kataleptike phantasia is utilized as the proper principle of action by assesment. Third, stoicism prescribed some principles as philosophical training and therapy. They are the cognition of ``thing itself`` and ``the exercise of discernment``, the point of view of the cosmos, and ``the exercise of self-expanding``, the view from above and ``the exercise of transcendental or unworldly attitude``.